Gaya APA
BENSON, R, C.
(l1977).
Handbook of obstetrics & gynecology
(
6 th. ed. )
.
Portland:
Lange Medica.
Gaya MLA
BENSON, Ralph, C..
"Handbook of obstetrics & gynecology".
6 th. ed.
Portland:
Lange Medica,
l1977.
Buku.