Gaya APA

Boyle, M. (1989). Journal Of Environmental Quality Vol. 18 No. 4 October - December 1989 . Madison, Wisconsin, AS: Cooperatively by The American Society Of Agronomy.

Gaya MLA

Boyle, Michael. "Journal Of Environmental Quality Vol. 18 No. 4 October - December 1989". Madison, Wisconsin, AS: Cooperatively by The American Society Of Agronomy, 1989. Text.