Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.