Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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