Gaya APA
JOHN, ., Kippley, S.
(1979).
The Art of Natural Family Planning
(
3rd Edition)
.
Cinrinnati:
CCL.
Gaya MLA
JOHN, ., Kippley, Sheila.
"The Art of Natural Family Planning".
3rd Edition
Cinrinnati:
CCL,
1979.
Text.