Gaya APA

Beckie, H, J. (1993). Weed Technology Vol. 7 No. 1 January - March 1993 . Madison, Wisconsin, AS: Weed Sciences Society Of America.

Gaya MLA

Beckie, Hugh, J.. "Weed Technology Vol. 7 No. 1 January - March 1993". Madison, Wisconsin, AS: Weed Sciences Society Of America, 1993. Text.