Penggayaan APA
BILLINGS, J.J. (1982).
Natural family planning : .
Sidney:
Rigby Publishers Limited.
Chicago Style
BILLINGS, J.J.
Natural family planning :.
Sidney:
Rigby Publishers Limited,
1982.
Buku.
MLA Style
BILLINGS, J.J.
Natural family planning :.
Sidney:
Rigby Publishers Limited,
1982.
Buku.
Turabian Style
BILLINGS, J.J.
Natural family planning :.
Sidney:
Rigby Publishers Limited,
1982.
Buku.