Gaya APA
DAVIDSON,Joan.. (1977).
Conservation and Agriculture .
New York:
John Wiley and Sons.
Gaya Chicago
DAVIDSON,Joan..
Conservation and Agriculture.
New York:
John Wiley and Sons,
1977.
Teks.
Gaya MLA
DAVIDSON,Joan..
Conservation and Agriculture.
New York:
John Wiley and Sons,
1977.
Teks.
Gaya Turabian
DAVIDSON,Joan..
Conservation and Agriculture.
New York:
John Wiley and Sons,
1977.
Teks.