Chemeketa Community College library uses the Dewey Decimal System. Every book has a Dewey Decimal call number that's used to keep books organized and to find them on the shelf. Call numbers group books on the same subject in the same location on the shelf. For example, all of the books with the 551.21 number are about volcanoes. Because there is often more than one book with the same Dewey Decimal number, the first letters of the author's last name and additional numbers are included.
The book with the call number illustrated (REF 423.1 Up8) is located in the Reference collection in the call number area 423.1 and the author's last name is Upton.
This short video will show you how to use Primo Library Search to discover books and articles in print and full text online at Chemeketa and many other libraries.
Yancey, Theresa. "How to Use Primo Library Search." Youtube, Chemeketa Community College, 7 December 2017, https://youtu.be/r0n2LeEGIfY.
Publication Manual of the American Psychological Association by 
MLA Handbook by