Gaya APA

Maxwell, B, D. (1990). Weed Technology Vol. 4 No. 1 January - March 1990 (Vol. 4 No. 1). Madison, Wisconsin, AS: Weed Sciences Society Of America.

Gaya MLA

Maxwell, Bruce, D.. "Weed Technology Vol. 4 No. 1 January - March 1990". Vol. 4 No. 1 Madison, Wisconsin, AS: Weed Sciences Society Of America, 1990. Text.