A digital object identifier (DOI) is a combination of letters and numbers string assigned by a registration agency (the International DOI Foundation) to identify content. The publisher assigns a DOI when your article is published and made available electronically.
It is recommended that when DOIs are available, include them for both print and electronic sources. The DOI is usually located on the first page of the electronic journal article, near the copyright notice. The DOI can also be found on the database landing page for the article.
example
Journal
Author, A. A. (Year of publication). Title of article. Title of Journal, volume(issue), pp. xxx-xxx. https://doi.org/xxxxx
Pashkova-Balkenhol, T., Lenker, M., Cox, E., & Kocevar-Weidinger, E. (2019). Should we flip the script?: A literature review of deficit-based perspectives on first-year undergraduate students’ information literacy. Journal of Information Literacy, 13(2), 92-111. https://dx.doi.org/10.11645/13.2.2619
Ebook
Author, A. A. (Year of publication). Title of book. Publisher. https://doi
Brown, L. S. (2018). Feminist therapy (2nd ed.). American Psychological Association. https://doi.org/10.1037/0000092-000
For example:
In-text citation
( Author, n.d.)
(Southey, n.d.)
Note: The titles of software and apps should be italicized in the reference list entry but not italicized in the text.
In-text citation
(Author or Name of group, Year of publication)
Author or Name of group (Year of publication)
(Viechtbauer et al., 2014)
Viechtbauer et al. (2019)
Reference List
Author, A. A., & Author, B. B. (Year of publication). Title of work (Version X) [Computer software]. Publisher. http://xxxx
Viechtbauer, W., Dewey, M., Henmi, M., Weiss, B., Hoeksema, J., & Cheung, M. (2019). The metaphor package: A meta-analysis package for R (Version 2.1-0) [Computer software]. The R foundation. http://www.metafor-project.org/doku.php/metafor
In-text citation
(Author, Year)
(Soils, 1999)
Reference list
Author, A. A. (Year of publication). Title of work [CD-ROM]. Publisher.
Soils. (1999). Geographica on CD ROM [CD ROM]. Random House.