Q. Is there a guide which will explain how to cite in APA style/format?

For a guide to citation in APA Style, use the Writing and Citing LibGuide - APA citations. It provides instruction & examples of APA-style citation formats from Berkeley College's CAS writing tutors.

You can find the library's 'Writing and Citing Libguide' via the library on Engage, use the 'Research Guides' button and search 'Writing and Citing'. 

You can also check APA Style and Grammar Guidelines, or this APA 7th Ed. Common Reference Examples list with a lot of examples to use as templates for different types of references.