APA (7th ed.) Zitazioa
ebrary, Inc, & Buol, S. W. (2011). Soil genesis and classification (6th ed.). Wiley-Blackwell.
Chicago Style (17th ed.) Zitazioa
ebrary, Inc, eta S. W. Buol. Soil Genesis and Classification. 6th ed. Chichester, West Sussex ; Ames, Iowa: Wiley-Blackwell, 2011.
MLA (9th ed.) Zitazioa
ebrary, Inc, eta S. W. Buol. Soil Genesis and Classification. 6th ed. Wiley-Blackwell, 2011.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.