Gaya APA

Healy, R, W., Mills, P, C. (1991). Soil Science Society of America Journal Vol. 55 No. 4 July-August 1991 (Vol. 55 No. 4). Madison, Wisconsin, AS: .

Gaya MLA

Healy, Richard, W.., Mills, Patrick, C.. "Soil Science Society of America Journal Vol. 55 No. 4 July-August 1991". Vol. 55 No. 4 Madison, Wisconsin, AS: , 1991. Text.