APA (7th ed.) Citation

Cunningham, F. G., MacDonald, P. C., & Gant, N. F. (1996). Obstetricia de Williams (20 ed.). Masson.

Chicago Style (17th ed.) Citation

Cunningham, F. Gary, Paul C. MacDonald, and Norman F. Gant. Obstetricia De Williams. 20 ed. Buenos Aires: Masson, 1996.

MLA (9th ed.) Citation

Cunningham, F. Gary, et al. Obstetricia De Williams. 20 ed. Masson, 1996.