Gaya APA
Cramer, G, L., Jensen, C, W. (1979).
Agricultural economics & agribusiness : an introduction .
New York:
John Willey and Sons.
Gaya MLA
Cramer, Gail, L.., Jensen, Clarence, W..
"Agricultural economics & agribusiness : an introduction".
New York:
John Willey and Sons,
1979.
Text.