APA (7th ed.) Citation

Kolby, J. (2011). GRE 4000: The 4000 words essential for the GRE. Nova Press.

Chicago Style (17th ed.) Citation

Kolby, Jeff. GRE 4000: The 4000 Words Essential for the GRE. Los Angeles: Nova Press, 2011.

MLA (9th ed.) Citation

Kolby, Jeff. GRE 4000: The 4000 Words Essential for the GRE. Nova Press, 2011.

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