Gaya APA

Persson, M. (1997). Soil Science Society of America Journal Vol. 61 No. 4 july-August 1997 (Vol. 61 No. 4). Madison, Wisconsin, AS: .

Gaya MLA

Persson, Magnus. "Soil Science Society of America Journal Vol. 61 No. 4 july-August 1997". Vol. 61 No. 4 Madison, Wisconsin, AS: , 1997. Text.