Gaya APA

Weston, L, A. (1989). Weed Socience Vol.37 No. 3 May 1989 . Madison, Wisconsin, AS: Weed science Society of america.

Gaya MLA

Weston, Leslie, A.. "Weed Socience Vol.37 No. 3 May 1989". Madison, Wisconsin, AS: Weed science Society of america, 1989. Text.