Gaya APA

Pan, L., Wierenga, P, J. (1997). Soil Science Society of America Journal Vol. 61 No. 2 March-April 1997 (Vol. 61 No. 2). Madison, Wisconsin, AS: .

Gaya MLA

Pan, Lehua., Wierenga, Peter, J.. "Soil Science Society of America Journal Vol. 61 No. 2 March-April 1997". Vol. 61 No. 2 Madison, Wisconsin, AS: , 1997. Text.