Gaya APA
Pritchard, ., MacDonald, G.
(1991).
Obstetri Williams
(
17)
.
Surabaya:
Airlangga University Press.
Gaya MLA
Pritchard, ., MacDonald, Gant.
"Obstetri Williams".
17
Surabaya:
Airlangga University Press,
1991.
Text.