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Referencing Guide: Print Journal

APA Referencing and style guide

What is DOI?

A Digital Object Identifier (DOI) is a way to keep track of content in a digital environment. Many periodical articles are assigning a DOI to each article in an issue. The DOI is unique and can be used by the reader to locate more citation information about the article. When a DOI is assigned, use it in place of other locating material (URL or database name).

Websites to help with DOI

Crossref is a  a not-for-profit membership organization for scholarly publishing working to make content easy to find, link, cite and assess.

Search Crossref's database of 80 million records for authors, titles, DOIs, ORCIDs, ISSNs, funders, license URIs, etc. You can even paste entire references into the search box and discover their DOIs. This is the web site of the International DOI Foundation (IDF), a not-for-profit membership organization. It will help you to resolve the DOI name.

Article from a print journal (no DOI)

Notice that periodical titles are capitalized like the standard title capitalization where all major words in the title are capitalized,Title of Periodical.


Marshall, M. & Clark, A. M. (2010). Is clarity essential to good teaching? Teaching Philosophy, 33(3), 271-289.

In-text Citation

(Marshall & Clark, 2010).

Article from a print journal (with DOI)



Chaffee, B. W. & Weston, S. J. (2010). Association between chronic periodontal disease and obesity: A systematic review and meta-analysis. Journal of Periodontology, 81(12), 1708-1724. doi: 10.1902/jop.2010.100321

In-text Citation

(Chaffee & Weston, 2010).