Gaya APA

Clark, F, E., Weld, L, D, H. (1950). Marketing Agricultural Products in the United States . New York: The Macmillan Company - New York.

Gaya MLA

Clark, Fred, E.., Weld, L., D., H.. "Marketing Agricultural Products in the United States". New York: The Macmillan Company - New York, 1950. Koleksi Elektronik.