APA (7th ed.) Citation

WILLSON, CARRINGTON, LAROS, LEDGER, & MATTOX. (1991). Obstetrics and gynecology. Mosby Year Book.

Chicago Style (17th ed.) Citation

WILLSON, CARRINGTON, LAROS, LEDGER, and MATTOX. Obstetrics and Gynecology. St Louis: Mosby Year Book, 1991.

MLA (8th ed.) Citation

WILLSON, et al. Obstetrics and Gynecology. Mosby Year Book, 1991.