Gaya APA

Sharma, P, P. (1991). Soil Science Society of America Journal Vol. 55 No. 2 March - April 1991 (Vol. 55 No. 2). Madison, Wisconsin, AS: .

Gaya MLA

Sharma, P., P. "Soil Science Society of America Journal Vol. 55 No. 2 March - April 1991". Vol. 55 No. 2 Madison, Wisconsin, AS: , 1991. Text.