Gaya APA

Cunningham, F, G. (2016, 2017, 2018). Obstetri Williams, Edisi 23, Volume 1 (23). Jakarta: EGC.

Gaya MLA

Cunningham, F., Gary. "Obstetri Williams, Edisi 23, Volume 1". 23 Jakarta: EGC, 2016, 2017, 2018. Text.