Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

Stevenson, F. J. Humus Chemistry: Genesis, Composition, Reactions. Nueva York: John Wiley, 1982.

Cita MLA (9th ed.)

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