Gaya APA

Johnson, D, W. (1992). Journal Of Environmental Quality Vol. 21 No. 1 January - March 1992 . Madison, Wisconsin, AS: Cooperatively by The American Society Of Agronomy.

Gaya MLA

Johnson, Dale, W.. "Journal Of Environmental Quality Vol. 21 No. 1 January - March 1992". Madison, Wisconsin, AS: Cooperatively by The American Society Of Agronomy, 1992. Text.