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| University Libraries
See Updates and FAQs for the latest library services updates. Subject Librarians are available for online appointments, and Virtual Reference has extended hours.

Potomac Environmental Research and Education Center

Library resources to support the education and research activities at PEREC

Online Research Help Fall 2020

UPDATE:   8/19/2020

The Mason Libraries will reopen on Monday 8/24/2020, to serve the needs of Mason faculty, staff and students. For more information, please visit our  FAQ page ( and our Library Services Updates page (

For Research Help:

  • Contact me via email and I will respond within 24 hrs.  OR use the schedule button below.
  • As you prefer, we can meet online via Zoom or talk on the phone. I will send you meeting information once the meeting is scheduled.

Take care!

Kim Hoffman

Begin your research

Welcome to the Potomac Environmental Research and Education Center Infoguide.

Use this guide to discover environmental sciences resources available to you at Mason and online.

EVPP 302 Research Fall 2020

APA Module

Watch this video on APA Citation Style

Note: Changes in APA formatting:
Summary of notable changes (thanks to  College of DuPage Library
·       Website URLs no longer need to be preceded with “Retrieved from:”.
·       Ebooks no longer require type of ebook to be listed (e.g. PDF, Kindle etc)
·       Journal DOIs now displayed as a URL instead of “DOI:” prefix. 
         For example: “DOI: 10.1109/5.771073” becomes “https⁚//”
·       The publisher location is no longer required. 
         For example:  “New York: Macmillan” is now just “Macmillan”.
·       The running head rules are “simplified,” and running heads are 
         not required for student papers
·       The first in-text citation of a work by more than two authors may list 
        only the first author, followed by “et al.”
·       The reference section lists up to 20 authors for a single work

Take this APA Quiz

IN-Class materials


Related Research Guides

The following guides may be useful for doing research in environmental sciences: