Cita APA (7th ed.)

CUNNINGHAM, F., & PENDIT, B. U. (2012). Obstetri Williams 2. EGC.

Cita Chicago (17th ed.)

CUNNINGHAM, F.Gary, i Brahm U. PENDIT. Obstetri Williams 2. EGC, 2012.

Cita MLA (9th ed.)

CUNNINGHAM, F.Gary, i Brahm U. PENDIT. Obstetri Williams 2. EGC, 2012.

Atenció: Aquestes cites poden no estar 100% correctes.