Gaya APA

Rickman, R, W. (1989). Soil Science Society Of America Journal Vol. 53 No. 1 January - February 1989 . Madison, Wisconsin, AS: Soil Science Society of America, Inc..

Gaya MLA

Rickman, R., W.. "Soil Science Society Of America Journal Vol. 53 No. 1 January - February 1989". Madison, Wisconsin, AS: Soil Science Society of America, Inc., 1989. Text.