Gaya APA

Hall, J, C. (1990). Weed Technology Vol. 4 No. 2 April - June 1990 (Vol. 4 No. 2). Madison, Wisconsin, AS: Weed Sciences Society Of America.

Gaya MLA

Hall, J., Christopher. "Weed Technology Vol. 4 No. 2 April - June 1990". Vol. 4 No. 2 Madison, Wisconsin, AS: Weed Sciences Society Of America, 1990. Text.