Cita APA (7a ed.)

Cunningham, F. G., Macdonald, P. C., & Gant, N. F. Williams: Obstetricia (4a ed.).

Cita Chicago Style (17a ed.)

Cunningham, F. Gary, Paul C. Macdonald, y Norman F. Gant. Williams: Obstetricia. 4a ed.

Cita MLA (8a ed.)

Cunningham, F. Gary, et al. Williams: Obstetricia. 4a ed.