Gaya APA

Cunningham, . (2012). Obstetri Williams : Edisi 23, Volume 1 (Vol.1 Edisi 23). Jakata: EGC.

Gaya MLA

Cunningham, . "Obstetri Williams : Edisi 23, Volume 1". Vol.1 Edisi 23 Jakata: EGC, 2012. Text.