Jaffe, E. D., & Hilbert, S. (2005). How to prepare for the graduate management admission test: Barron's GMAT. Barron's.
Lua i Stíl Chicago (17ú heag.)Jaffe, Eugene D., agus Stephen Hilbert. How to Prepare for the Graduate Management Admission Test: Barron's GMAT. Hauppauge, N.Y.: Barron's, 2005.
Lua MLA (8ú heag.)Jaffe, Eugene D., agus Stephen Hilbert. How to Prepare for the Graduate Management Admission Test: Barron's GMAT. Barron's, 2005.
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