Jaffe, E. D., & Hilbert, S. (2001). Barron's pass key to the GMAT (Computer-Adaptive Graduate Management Admission Test) (3rd ed.). Barron's Educational Series.
Chicago-referens (17:e uppl.)Jaffe, Eugene D., och Stephen Hilbert. Barron's Pass Key to the GMAT (Computer-Adaptive Graduate Management Admission Test). 3rd ed. Hauppauge, NY: Barron's Educational Series, 2001.
MLA-referens (9:e uppl.)Jaffe, Eugene D., och Stephen Hilbert. Barron's Pass Key to the GMAT (Computer-Adaptive Graduate Management Admission Test). 3rd ed. Barron's Educational Series, 2001.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.