Παραπομπή APA
Jaffe, E. D., & Hilbert, S. (2001). Barron's GMAT: How to prepare for the Graduate Management Admission Test (12th ed.). New York: Barron's Educational.
Παραπομπή Chicago StyleJaffe, Eugene D., and Stephen Hilbert. Barron's GMAT: How to Prepare for the Graduate Management Admission Test. 12th ed. New York: Barron's Educational, 2001.
Παραπομπή MLAJaffe, Eugene D., and Stephen Hilbert. Barron's GMAT: How to Prepare for the Graduate Management Admission Test. 12th ed. New York: Barron's Educational, 2001.
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