Gaya APA
RITSON, CHRISTOPHER. (1977).
Agricultural economics principles and policy .
London:
Granada.
Gaya Chicago
RITSON, CHRISTOPHER.
Agricultural economics principles and policy.
London:
Granada,
1977.
.
Gaya MLA
RITSON, CHRISTOPHER.
Agricultural economics principles and policy.
London:
Granada,
1977.
.
Gaya Turabian
RITSON, CHRISTOPHER.
Agricultural economics principles and policy.
London:
Granada,
1977.
.