Cita APA (7th ed.)

Stevenson, F. J. (1982). Humus chemistry: Genesis, composition, reactions. John Wiley and Sons.

Cita Chicago (17th ed.)

Stevenson, F. J. Humus Chemistry: Genesis, Composition, Reactions. New York: John Wiley and Sons, 1982.

Cita MLA (9th ed.)

Stevenson, F. J. Humus Chemistry: Genesis, Composition, Reactions. John Wiley and Sons, 1982.