APA Style

Levono, K., Cunningham, F, G, [. (2009). Obstetri Williams Panduan Ringkas (ed. 21). Jakarta: EGC.

MLA Style

Levono, Kenneth., Cunningham, F., Gary, [at.al]. "Obstetri Williams Panduan Ringkas". ed. 21 Jakarta: EGC, 2009. Text.