There are various online tools that will generate both in-text and bibliographic citations. It is important to keep in mind that these tools are not fool-proof. Some may not be using the current style manual edition, and some may incorrectly generate a citation. It is up to you to double-check the generated citation with the latest style manual.
Zotero - see the library's guide on using Zotero by clicking here.
The Publication Manual of the American Psychological Association provides detailed guidelines for using APA style. The current edition of the APA Publication Manual is kept on the Reference shelves on the main floor of the library building.
Publication Manual of the American Psychological Association by 