APA Style
Oelhaf, Robert C. (1978).
Organic agriculture : economic and ecological comparisons with conventional methods .
New York:
New York, John Wiley, 1968.
Chicago Style
Oelhaf, Robert C.
Organic agriculture : economic and ecological comparisons with conventional methods.
New York:
New York, John Wiley, 1968,
1978.
Buku Teks.
MLA Style
Oelhaf, Robert C.
Organic agriculture : economic and ecological comparisons with conventional methods.
New York:
New York, John Wiley, 1968,
1978.
Buku Teks.
Turabian Style
Oelhaf, Robert C.
Organic agriculture : economic and ecological comparisons with conventional methods.
New York:
New York, John Wiley, 1968,
1978.
Buku Teks.