Gaya APA
Beierlenin, J, G., W, W, M. (1991).
Agribusiness Marketing : The Management Perspective .
Amerika:
Prentice Hall.
Gaya MLA
Beierlenin, James, G., W, Woolverton., Michael.
"Agribusiness Marketing : The Management Perspective".
Amerika:
Prentice Hall,
1991.
Textbook.