Gaya APA

Wilson, K, K., Morren, G, E. (1990). System approaches for improvement in agriculture and resource management / Kathleen K. Wilson, George E.B. Morren, Jr. . New York: Macmillan.

Gaya MLA

Wilson, Kathleen, Karah., Morren, George, E.B.. "System approaches for improvement in agriculture and resource management / Kathleen K. Wilson, George E.B. Morren, Jr.". New York: Macmillan, 1990. Textbook.