Why the DOI and URL Question Comes Up So Often
One of the most consistent areas of confusion in APA citation among Malaysian postgraduate students is knowing when to use a DOI, when to use a URL, and what to do when neither is available. The rules for DOI vs URL in APA references changed noticeably between the 6th and 7th editions, and students who learned from older resources or from peers using different edition guidelines often have an inconsistent mix of practices in their reference lists. Getting this right is worth the attention — a reference list that handles DOIs and URLs correctly demonstrates careful engagement with citation standards that examiners notice.
The fundamental purpose of both DOIs and URLs in a reference list is the same: to give readers a reliable way to locate the source you cited. The DOI (Digital Object Identifier) is the more stable of the two because it is permanently assigned to a document and does not change when a publisher moves its website or reorganises its content. A URL, by contrast, can become outdated if the hosting site changes its structure. APA 7th therefore has a clear preference for DOIs over URLs when both are available for the same source.
The APA 7th Rule: DOI Over URL, Always
In APA 7th, when a source has a DOI, you include the DOI and do not additionally include the URL, even if a URL is also available. The DOI is sufficient. DOIs are formatted as hyperlinks in APA 7th: https://doi.org/10.xxxx/xxxxx — note that the current APA recommendation uses the full https://doi.org/ prefix rather than the older “doi:” abbreviation that appeared in APA 6th references. Many students still use the old format — “doi: 10.xxxx/xxxxx” without the https prefix — because they learned from sources or templates that follow the 6th edition convention. Update every DOI in your reference list to the current format before submission.
The decision rule is straightforward: does the source have a DOI? If yes, use it in the format https://doi.org/[number]. Do not include a URL in addition to the DOI. Do not add “Retrieved from” before the DOI — this phrasing was used in APA 6th and has been dropped in 7th. The DOI simply appears at the end of the reference as a hyperlink.
When to Include a URL Instead of a DOI
URLs are used in APA 7th references when a source does not have a DOI. This applies to websites, online newspaper articles, government reports, institutional documents, and other web-based content that has never been assigned a DOI. In these cases, include the URL that leads directly to the specific document or page — not the homepage of the website. “https://www.moe.gov.my/en” is not a useful URL for a specific Ministry of Education report; the URL that leads directly to that report’s PDF or webpage is what belongs in the reference.
For DOI vs URL in APA references, the practical question when you encounter a URL-only source is: will this URL still work in the future? For stable institutional documents — government publications archived at permanent URLs, university press books with stable DOI-like identifiers, official policy documents hosted at institutional URLs — the URL is unlikely to break. For general web articles or pages that may be reorganised, APA 7th recommends noting a retrieval date as well: “Retrieved May 4, 2026, from https://…” This retrieval date convention applies mainly to content that is designed to change over time, such as Wikipedia pages or frequently updated institutional websites.
When No DOI or URL Is Available
For print-only sources — books published before the digital age, journal articles in print-only volumes, physical reports without digital versions — no DOI or URL is included in the reference. The reference simply ends after the publisher information or journal details. Many Malaysian students feel compelled to add a URL for everything, sometimes linking to a Google Scholar search result or a ResearchGate page rather than the actual source. This is not correct APA practice. If the source has no DOI and no stable direct URL, the reference ends without one.
A common mistake is linking to a library database landing page — the page your university library uses to grant access to a journal article — rather than the article’s own DOI or publisher URL. Library database URLs are institution-specific and will not work for any reader without your institution’s subscription. The DOI, by contrast, resolves independently of any particular library subscription. Always use the DOI rather than a library database URL when both are available.
Finding Missing DOIs for Sources You Already Have
When reviewing your reference list for DOI vs URL compliance in APA, you may find that some sources you have cited lack DOIs in the information you recorded when you first accessed them. Before concluding that a source has no DOI, check the CrossRef search tool at search.crossref.org. Entering the article title or ISSN will return the DOI if one has been assigned. Many journal articles published in the last two decades have DOIs even if the DOI was not visible on the page where you accessed them.
Similarly, check whether books you have cited have ISBNs that correspond to digital editions with DOIs, particularly for academic press books published after 2010. Reference management software like Mendeley, Zotero, or EndNote can also help identify missing DOIs if you sync your library with their online databases — these tools automatically retrieve and attach DOIs to records where they are available. Running this check across your full reference list before submission ensures that your DOI usage in APA references is as complete and accurate as possible, which is a mark of the careful scholarly attribution that your thesis deserves.
