Gaya APA

Oberle, S, L., Keeney, D, R. (1991). Journal Of Environmental Quality Vol. 20 No. 1 January-March 1991 (Vol. 20 No. 1). Madison, Wisconsin, AS: Cooperatively by The American Society Of Agronomy.

Gaya MLA

Oberle, S., L.., Keeney, D., R.. "Journal Of Environmental Quality Vol. 20 No. 1 January-March 1991". Vol. 20 No. 1 Madison, Wisconsin, AS: Cooperatively by The American Society Of Agronomy, 1991. Text.