Gaya APA
CUNNINGHAM, F, G. et al
(1995).
OBSTETRI WILLIAMS
(
EDISI 18)
.
YOGYAKARTA:
DIAN RAKYAT.
Gaya MLA
CUNNINGHAM, F, GARY. et al.
"OBSTETRI WILLIAMS".
EDISI 18
YOGYAKARTA:
DIAN RAKYAT,
1995.
UMUM.