Cita APA

STEVENSON, F. Humus chemistry genesis, composition, reactions. New York.

Chicago Style (17th ed.) Citation

STEVENSON, F.J. Humus Chemistry Genesis, Composition, Reactions. New York.

Cita MLA

STEVENSON, F.J. Humus Chemistry Genesis, Composition, Reactions. New York.

Atenció: Aquestes cites poden no estar 100% correctes.