If you want to cite a journal article in APA, you need the following pieces of information.
- A list of authors with their last names and initials
- The title of work
- The title of the journal it was published in
- The information of the journal it was published in (Volume and number)
- Start and end page numbers
- What year it was published (if necessary to uniquely identify the item: the full date it was published). In the absence of a date, n.d. is acceptable (for no date)
- Its DOI (document object identifier, generally a long series of letters and numbers, sometimes with a slash) OR, in the absence of a DOI, a URL
For example...
Doe, J. and Day, T. (2017). A Fake Title. A Fake Journal 1(1), 34-38. doi: f0a0k0e/j0urn4l
Doe, J., Day, T. and Rowe, R. (2017). A Second Fake Title. A Fake Journal 1(1), 38-42. doi: f0a0k0e/j0urn5l