APA
OLSON G. W., . (1981). Soils and the environment: A guide to soil surveys and their applications. New York: Chapman & Hall.
Chicago
OLSON Gerald W, . 1981. Soils and the environment: A guide to soil surveys and their applications. New York: Chapman & Hall.
Harvard
OLSON G. W., . (1981). Soils and the environment: A guide to soil surveys and their applications. New York: Chapman & Hall.
MLA
OLSON Gerald W, . Soils and the environment: A guide to soil surveys and their applications. New York: Chapman & Hall. 1981.