Gaya APA

Mccracken, R, J. (1987). Soil Science Society Of America Journal Vol. 51 No. 6 November - December 1987 . Madison, Wisconsin, AS: Soil Science Society of America, Inc..

Gaya MLA

Mccracken, Ralph, J.. "Soil Science Society Of America Journal Vol. 51 No. 6 November - December 1987". Madison, Wisconsin, AS: Soil Science Society of America, Inc., 1987. Text.