Gaya APA
Cunningham, F, G.
(1995).
Obstetri Williams ed 18
(
18)
.
Hoboken, NJ:
EGC.
Gaya MLA
Cunningham, F., Gary.
"Obstetri Williams ed 18".
18
Hoboken, NJ:
EGC,
1995.
PRINTED BOOK.