Gaya APA

Johnson, B, J. (1989). Weed Technology Vol. 3 No. 3 July - September 1989 (Vol. 3 No. 3). Madison, Wisconsin, AS: Weed Sciences Society Of America.

Gaya MLA

Johnson, Billy, J.. "Weed Technology Vol. 3 No. 3 July - September 1989". Vol. 3 No. 3 Madison, Wisconsin, AS: Weed Sciences Society Of America, 1989. Text.