APA (7th ed.) Citation

Kolby, J., & Vaughn, D. (2008). Nova's GMAT math bible. Nova Press.

Chicago Style (17th ed.) Citation

Kolby, Jeff, and Derrick Vaughn. Nova's GMAT Math Bible. Los Angeles, CA: Nova Press, 2008.

MLA (9th ed.) Citation

Kolby, Jeff, and Derrick Vaughn. Nova's GMAT Math Bible. Nova Press, 2008.

Warning: These citations may not always be 100% accurate.