APA (7th ed.) Zitazioa

Richter, D. D. Understanding soil change: Soil sustainability over millennia, centuries, and decades. Cambridge.

Chicago Style (17th ed.) Zitazioa

Richter, Daniel D. Understanding Soil Change: Soil Sustainability over Millennia, Centuries, and Decades. c2001: Cambridge.

MLA (9th ed.) Zitazioa

Richter, Daniel D. Understanding Soil Change: Soil Sustainability over Millennia, Centuries, and Decades. Cambridge.