Gaya APA

Nimmo, J, R. (1988). Soil Science Society Of America Journal Vol. 52 Mo. 2 March - April 1988 . Madison, Wisconsin, AS: Soil Science Society of America, Inc..

Gaya MLA

Nimmo, John, R.. "Soil Science Society Of America Journal Vol. 52 Mo. 2 March - April 1988". Madison, Wisconsin, AS: Soil Science Society of America, Inc., 1988. Text.