Most of the journal articles you have retrieved for your work were probably found online through one of our article databases, such as CINAHL. If this is the case, you need to consider the following:
Example of what a doi might look like: doi:10.4839/087-382184.108.40.2063
Example of homepage URL: http://www.healio.com/journals/jne (for the Journal of Nursing Education)
For more information, see p. 198 - Periodicals or Western Libraries' guide Citing Sources According to APA
All information and page number references are based on the 6th edition of the Publication Manual of the American Psychological Association (2009/10).
Need a copy of the Publication Manual? Click here for details. See Also: APA Style Guide to Electronic References, Sixth Edition