APA (7th ed.) Citation

Graduate Management Admission Council & Educational Testing Service. (1988). The official guide for GMAT review: Prepared for the Graduate Management Admission Council (1988-90 edition.). Educational Testing Service.

Chicago Style (17th ed.) Citation

Graduate Management Admission Council and Educational Testing Service. The Official Guide for GMAT Review: Prepared for the Graduate Management Admission Council. 1988-90 edition. Princeton,NJ: Educational Testing Service, 1988.

MLA (9th ed.) Citation

Graduate Management Admission Council and Educational Testing Service. The Official Guide for GMAT Review: Prepared for the Graduate Management Admission Council. 1988-90 edition. Educational Testing Service, 1988.