Cita APA (7a ed.)

Williams, J. W. (1971). Williams obstetrics (14th ed.). Appleton-Century-Crofts.

Cita Chicago Style (17a ed.)

Williams, J. Whitridge. Williams Obstetrics. 14th ed. New York: Appleton-Century-Crofts, 1971.

Cita MLA (9a ed.)

Williams, J. Whitridge. Williams Obstetrics. 14th ed. Appleton-Century-Crofts, 1971.