Gaya APA

Leveno, K, J., Cunningham, F, G. (2012). Obstetri Williams Edisi 23 Volume 1 (23). Jakarta: EGC.

Gaya MLA

Leveno, Kenneth, J.., Cunningham, F., Gary. "Obstetri Williams Edisi 23 Volume 1". 23 Jakarta: EGC, 2012. Text.