DOI or URLs
This page addresses when to include digital object identifiers (DOIs) and uniform resource locators (URLs) in APA 7th ed. references. The information below comes from the APA 7th Ed. Style Blog
The DOI or URL is the final component of a reference list entry.
- A DOI is a unique alphanumeric string that identifies content and provides a persistent link to its location on the internet. DOIs can be found in database records and reference lists of published works.
- A URL specifies the location of digital information on the internet and can be found in the address bar of your internet browser. URLs in references should link directly to the cited work when possible.
| When should you use the DOI? |
- Include a DOI for all works that have a DOI, regardless of whether you used the online version or the print version.
- If a print work does not have a DOI, do NOT include any DOI or URL in the reference.
- If you have both a DOI and a URL, only use the DOI number.
- If an online work has a URL but no DOI, include the URL in the reference as follows:
- For works without DOIs from most academic research databases (library databases), do not include a URL or database information in the reference because these works are widely available. The reference should be the same as the reference for a print version of the work.
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How do you find a DOI number?
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Most citations include the DOI, but in many cases, you will need to investigate whether there is a DOI associated with the article. Here are some ways you can do that.
- The document PDF typically includes the DOI if there is one.
- CrossRef.org - crossref.org provides a DOI Lookup service that will search for a DOI based on citation information (author's last name, journal name, article title, etc.).
- Google the article title - searching for an article title in Google (the search engine). If the article appears in the search results, these options publish the DOI if available:
- Look for a link to the publisher's website, e.g., Sage or Elsevier.
- A link to an open source research site, e.g., ResearchGate.net or SemanticScholar.org