Yes, there is a copy of the APA manual at the reference desk in the library. You are welcome to use this copy in the library, but it cannot be checked out.
There is also an eBook available to PSU students for a handbook on the 7th edition of the APA manual:
https://plymouth.on.worldcat.org/oclc/1176318115
From this link you can click on PDF Full Text to view the entire handbook.
Some of the information found in the APA manual (7th edition) is also available in the APA Style Guide to Electronic References, which is available for download to PSU students at http://libproxy.plymouth.edu/loggedin/APA-Style-Guide-to-Electronic-Resources.pdf.
Also the Purdue OWL has some helpful information on using APA.
https://owl.purdue.edu/owl/research_and_citation/apa_style/apa_style_introduction.html