How to Cite a Website So Readers Can Verify the Source

Students search for how to cite a website because the style guides give a template and the page in front of them refuses to fit it. There is no author, or the only date is a copyright line in the footer, or the page changed last week. This guide formats one real NASA page in APA 7, MLA 9 and Chicago, shows what to do when an element is missing, and then covers the part the guides leave to you: making the citation checkable by citing the specific page, linking to the exact sentence and saving a dated copy.

What every website citation needs

A web page hides its facts in different corners: the byline near the title, the date in a footer, the site name in the browser tab. Collect them first, then format. The five elements are the author (a person or an organisation), the date, the page title, the site name and the address. A sixth, the date you read the page, is needed only when the content can change.

The Purdue OWL guide to electronic sources in APA style gives the order: author, date in parentheses, page title in italics, site name, address. Its MLA counterpart adds a habit worth copying: keep a record of when you first consulted each online source, because online information can change or disappear.

How to cite a website in APA, MLA and Chicago

The example is the NASA Science page titled Black Holes, at science.nasa.gov/universe/black-holes/. On 24 September 2026 it shows no byline, a footer line reading Page Last Updated: Aug 12, 2026, and a page editor's name. An editor is not an author, so the author is NASA and the site name is NASA Science.

APA writes the title in sentence case and puts the full date after the author. MLA drops the author when the organisation that wrote the page also publishes the site, so its entry begins with the title. Chicago writes last updated, because the page has no publication date of its own.

For a quotation, APA wants a locator on an unnumbered page: count the paragraphs and write para. and the number. MLA cites the title alone. Ellipses, brackets and block quotations follow the rules in the guide to quoting a line and citing it in three styles covers.

Pages with no author, no date or no title

Most web pages lack at least one element. Every style fills the slot with the next most useful fact.

One caution: a copyright year in the footer is the site's date, not the page's. Treat it as no date.

Make the citation checkable, not only correct

A well formatted citation to a page that has since changed proves nothing. Three additions to your own record fix that.

1. 1

   Cite the specific page, never the homepage

   The address must open the page that contains the words. Copy it from the browser bar and strip any tracking parameters after the question mark if the page opens without them.

2. 2

   Highlight the sentence and make a link to it

   Build a highlight link: the address followed by #:~:text= and the sentence, which current browsers open scrolled to that sentence with the text marked. You can paste the address and the sentence into the generator and copy the result.

3. 3

   Save an archived copy with the Wayback Machine

   Paste the page address into the Save Page Now box at web.archive.org. The Internet Archive help page says the service saves the page and gives you a permanent address. Do it on the day you read the page, so the timestamp and your access date agree.

4. 4

   Cite the archive address when the page may change

   For a news story, a policy page, a wiki or anything with an update line, give the archived address after or instead of the live one. APA already recommends this for Wikipedia entries.

5. 5

   Record the access date and the highlight link together

   Write the reading date, the highlight link and the archive address on one line under the citation. That line is your record.

A worked example, start to finish

Suppose your essay says that black holes are not empty space, and you quote NASA: "They're huge concentrations of matter packed into very tiny spaces." Here is the full record for that sentence, as it would sit in your notes.

The citation goes into the reference list and the locator after the quotation. The rest stays in your notes, or in a footnote if the assignment invites it. If NASA rewrites the paragraph next spring, you can still show the sentence you quoted. The highlight link uses four words because a text fragment matches the first occurrence on the page; why a highlight link sometimes opens at the wrong spot covers repeated phrases.

Pitfalls when citing a website

• Citing the homepage. The reader lands on a menu and has to guess.
• Using the footer copyright year as the date. It belongs to the site, not the page.
• Treating a search engine or a chatbot as the source. They are how you found the page, not the source.
• Copying an address with tracking parameters. Everything after the question mark usually identifies your session, not the page.
• Leaving the retrieval date off a page that changes. No one can then tell which version you read.

Expert tips for citations that hold up

• Gather the elements into a five-line note before formatting. Formatting from that note takes a minute in any style.
• Look for a published or updated line before settling for n.d. Many sites print the date only near the footer.
• Archive first, cite second. Then the archive timestamp and your access date match.
• Keep one record line per source, in the essay's folder. A journalist would call it a log; the log format that pairs each claim with a link is the same idea.
• Treat the archive address as part of the citation. Letting a reader verify the source is what a citation is for, and it is the principle behind every guide on this site about highlights kept as a record.

A checkable citation depends on two habits covered nearby: confirming that the page you cite is the origin of the claim and not a copy, and saving an archived copy and a dated note as digital evidence so the citation still resolves after the page changes.

Knowing how to cite a website is half formatting and half record keeping. Collect the five elements, put them in your style's order, and fill any gap with the substitute the guides provide. Then cite the exact page, link to the exact sentence, and save a dated copy. The citation tells the reader where you looked. The record proves what was there.