Gaya APA

Sidle, R, C. (1991). Journal Of Environmental Quality Vol. 20 No. 1 January - March 1991 . Madison, Wisconsin, AS: Cooperatively by The American Society Of Agronomy.

Gaya MLA

Sidle, Roy, C.. "Journal Of Environmental Quality Vol. 20 No. 1 January - March 1991". Madison, Wisconsin, AS: Cooperatively by The American Society Of Agronomy, 1991. Text.