What to look out for with online sources?

There is a diversity of document types on the Internet: e-books, databases, programs, various types of websites, posts, blogs, electronic newsgroups, videos, images, social media posts, electronic news, etc. To cite them, it is always essential to distinguish just what type of document it is and cite it according to that type.

Specific examples of citations of online sources can be found in the Citation Examples section, where you can filter by citation style for a specific type of document, including its online version.

When to include digital object identifiers (DOIs) and uniform resource locators (URLs) in APA Style references?

The DOI or URL is the final component of a reference list entry. Because so much scholarship is available and/or retrieved online, most reference list entries end with either a DOI or a URL.

• 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 the 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.