APA uses in-text citations instead of footnotes or endnotes: (Last name, yyyy).
At the end of your paper include a reference list with complete bibliographic information. Here's how that would look for a journal article:
Author, A. A., Author, B. B., & Author, C. C. (Year). Title of article. Title of Periodical, volume number(issue number), pages.
https://doi.org/xx.xxx/yyyy