Gaya APA

Wilberg, G, M. (1992). Preparing For Birth & Parenthood ; Awareness Training & Teaching Manual For Childbirth Professionals . Oxford: Bumi Aksara.

Gaya MLA

Wilberg, Gerlinde, M. "Preparing For Birth & Parenthood ; Awareness Training & Teaching Manual For Childbirth Professionals". Oxford: Bumi Aksara, 1992. Text.