Gaya APA

Buman, R, A. (1991). Weed Socience Vol. 39 No. 1 January - March 1991 . Madison, Wisconsin, AS: Weed science Society of america.

Gaya MLA

Buman, Robert, A.. "Weed Socience Vol. 39 No. 1 January - March 1991". Madison, Wisconsin, AS: Weed science Society of america, 1991. Text.