एपीए उद्धरण

Gerald W Olson. (1981). Soils and the environment: A guide to soil surveys and their applications. New York: Chapman and Hall.

शिकागो स्टाइल उद्धरण

Gerald W Olson. Soils and the Environment: A Guide to Soil Surveys and Their Applications. New York: Chapman and Hall, 1981.

एमएलए उद्धरण

Gerald W Olson. Soils and the Environment: A Guide to Soil Surveys and Their Applications. New York: Chapman and Hall, 1981.