Gaya APA
Hobbbcraft, John. (1984).
Birth intervals/ John Hobcraft ; John McDonald .
London:
WFS.
Gaya Chicago
Hobbbcraft, John.
Birth intervals/ John Hobcraft ; John McDonald.
London:
WFS,
1984.
.
Gaya MLA
Hobbbcraft, John.
Birth intervals/ John Hobcraft ; John McDonald.
London:
WFS,
1984.
.
Gaya Turabian
Hobbbcraft, John.
Birth intervals/ John Hobcraft ; John McDonald.
London:
WFS,
1984.
.