Gaya APA

AL], F, G, C, [. (2015). OBSTETRI WILLIAMS.-- VOL. 2 ed. 21 . SL: EGC.

Gaya MLA

AL], F., GARY, CUNNINGHAM, [ET. "OBSTETRI WILLIAMS.-- VOL. 2 ed. 21". SL: EGC, 2015. Text.