Graduate Management Admission Council & Educational Testing Service. (1986). The official guide for GMAT review (9th ed.). ETS.
Citace podle Chicago (17th ed.)Graduate Management Admission Council a Educational Testing Service. The Official Guide for GMAT Review. 9th ed. Princeton, N.J: ETS, 1986.
Citace podle MLA (9th ed.)Graduate Management Admission Council a Educational Testing Service. The Official Guide for GMAT Review. 9th ed. ETS, 1986.
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