Gaya APA

Petrovic, A, M. (1990). Journal Of Environmental Quality Vol. 19 No. 1 January - March 1990 (Vol. 19 No. 1). Madison, Wisconsin, AS: Cooperatively by The American Society Of Agronomy.

Gaya MLA

Petrovic, A., Martin. "Journal Of Environmental Quality Vol. 19 No. 1 January - March 1990". Vol. 19 No. 1 Madison, Wisconsin, AS: Cooperatively by The American Society Of Agronomy, 1990. Text.