Cita APA (7a ed.)

Kaplan, Inc. (2012). New GMAT essentials 2013. Kaplan Pub.

Cita Chicago Style (17a ed.)

Kaplan, Inc. New GMAT Essentials 2013. New York: Kaplan Pub, 2012.

Cita MLA (9a ed.)

Kaplan, Inc. New GMAT Essentials 2013. Kaplan Pub, 2012.