Dyfyniad APA

Brady, N. C., & Well, R. R. (2005). The Nature and properties of Soils (13.).

Dyfyniad Arddull Chicago

Brady, Nyle C., and Ray R. Well. The Nature and Properties of Soils. 13. Delhi, Pearson Education, 2005.

Dyfyniad MLA

Brady, Nyle C., and Ray R. Well. The Nature and Properties of Soils. 13. 2005.

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