Cita APA (7th ed.)
Kolby, J. (2011). GRE 4000: The 4000 words essential for the GRE. Nova Press.
Cita Chicago (17th ed.)
Kolby, Jeff. GRE 4000: The 4000 Words Essential for the GRE. Los Angeles: Nova Press, 2011.
Cita MLA (9th ed.)
Kolby, Jeff. GRE 4000: The 4000 Words Essential for the GRE. Nova Press, 2011.
Atenció: Aquestes cites poden no estar 100% correctes.