Gaya APA

Cunningham, F, G. et al (2019). Obstetri Williams : Edisi 23, Volume 1 (Edisi 23, 2019). Jakarta: EGC.

Gaya MLA

Cunningham, F., Gary. et al. "Obstetri Williams : Edisi 23, Volume 1". Edisi 23, 2019 Jakarta: EGC, 2019. Text.