Cita APA (7th ed.)
ebrary, Inc, & Buol, S. W. (2011). Soil genesis and classification (6th ed.). Wiley-Blackwell.
Cita Chicago (17th ed.)
ebrary, Inc, i S. W. Buol. Soil Genesis and Classification. 6th ed. Chichester, West Sussex ; Ames, Iowa: Wiley-Blackwell, 2011.
Cita MLA (9th ed.)
ebrary, Inc, i S. W. Buol. Soil Genesis and Classification. 6th ed. Wiley-Blackwell, 2011.
Atenció: Aquestes cites poden no estar 100% correctes.