Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

Cunningham, F. Gary, Paul C. MacDonald, y Norman F. Gant. Obstetricia De Williams. 1996.

Cita MLA (9a ed.)

Cunningham, F. Gary, et al. Obstetricia De Williams. 1996.