Gaya APA
Abbott, J.C. (1979).
Agricultural economic and marketing in the tropics .
London:
Longman Group.
Gaya Chicago
Abbott, J.C.
Agricultural economic and marketing in the tropics.
London:
Longman Group,
1979.
.
Gaya MLA
Abbott, J.C.
Agricultural economic and marketing in the tropics.
London:
Longman Group,
1979.
.
Gaya Turabian
Abbott, J.C.
Agricultural economic and marketing in the tropics.
London:
Longman Group,
1979.
.