Gaya APA

Bjelk, L, A. (1992). Weed Socience Vol. 40 No. 1 Jnauary - March 1992 . Madison, Wisconsin, AS: Weed Sciences Society Of America.

Gaya MLA

Bjelk, Leslie, A.. "Weed Socience Vol. 40 No. 1 Jnauary - March 1992". Madison, Wisconsin, AS: Weed Sciences Society Of America, 1992. Text.