Cita APA (7a ed.)

Caplan, R. M. (1984). Principles of obstetrics. Williams & Wilkins.

Cita Chicago Style (17a ed.)

Caplan, Ronald M. Principles of Obstetrics. Baltimore: Williams & Wilkins, 1984.

Cita MLA (9a ed.)

Caplan, Ronald M. Principles of Obstetrics. Williams & Wilkins, 1984.