Princeton Review (Firm). (2017). Crash course for the GRE (6th edition.). Penguin Random House.
Chicago Style (17th ed.) CitationPrinceton Review (Firm). Crash Course for the GRE. 6th edition. New York: Penguin Random House, 2017.
MLA (8th ed.) CitationPrinceton Review (Firm). Crash Course for the GRE. 6th edition. Penguin Random House, 2017.
Warning: These citations may not always be 100% accurate.