Gaya APA

Jardine, P, M. (1989). Soil Science Society Of America Journal Vol. 53 No. 2 March - April 1989 . Madison, Wisconsin, AS: Soil Science Society of America, Inc..

Gaya MLA

Jardine, P., M.. "Soil Science Society Of America Journal Vol. 53 No. 2 March - April 1989". Madison, Wisconsin, AS: Soil Science Society of America, Inc., 1989. Text.