APA (7th ed.) Citation

Graduate Management Admission Council & Educational Testing Service. (1986). The official guide for GMAT review (8th ed.). ETS.

Chicago Style (17th ed.) Citation

Graduate Management Admission Council and Educational Testing Service. The Official Guide for GMAT Review. 8th ed. Princeton, N.J: ETS, 1986.

MLA (9th ed.) Citation

Graduate Management Admission Council and Educational Testing Service. The Official Guide for GMAT Review. 8th ed. ETS, 1986.