Cita APA (7th ed.)

Cunningham, F. G., MacDonald, P. C., Gant, N. F., Leveno, K. J., & Gilstrap III, L. C. (1996). Obstetricia de Williams (4 ed.). Masson.

Cita Chicago (17th ed.)

Cunningham, F. Gary, Paul C. MacDonald, Norman F. Gant, Kenneth J. Leveno, i Larry C. Gilstrap III. Obstetricia De Williams. 4 ed. Barcelona: Masson, 1996.

Cita MLA (9th ed.)

Cunningham, F. Gary, et al. Obstetricia De Williams. 4 ed. Masson, 1996.