APA

(1957). Soils and Soil Fertility. New York: McGRAW-HILL BOOK COMPANY.

Chicago

1957. Soils and Soil Fertility. New York: McGRAW-HILL BOOK COMPANY.

Harvard

(1957). Soils and Soil Fertility. New York: McGRAW-HILL BOOK COMPANY.

MLA

Soils and Soil Fertility. New York: McGRAW-HILL BOOK COMPANY. 1957.