Cita APA (7th ed.)

OBSTETRI WILLIAMS & CUNNINGHAM, F. G. [. (2006). Obstetri williams vol.1.-- ed.21. EGC.

Cita Chicago (17th ed.)

OBSTETRI WILLIAMS i F. Gary [et.al] CUNNINGHAM. Obstetri Williams Vol.1.-- Ed.21. Jakarta: EGC, 2006.

Cita MLA (9th ed.)

OBSTETRI WILLIAMS i F. Gary [et.al] CUNNINGHAM. Obstetri Williams Vol.1.-- Ed.21. EGC, 2006.