APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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

Kontuz: berrikusi erreferentzia hauek erabili aurretik.