Gaya APA

Donald, W, W. (1991). Weed Technology Vol. 5 No. 1 January - March 1991 (Vol. 5 No. 1). Madison, Wisconsin, AS: Weed Sciences Society Of America.

Gaya MLA

Donald, William, W.. "Weed Technology Vol. 5 No. 1 January - March 1991". Vol. 5 No. 1 Madison, Wisconsin, AS: Weed Sciences Society Of America, 1991. Text.