Dyfyniad APA

Brady, N. C. (1990). The nature and properties of soils. New York: Macmillan Publishing Company.

Dyfyniad Arddull Chicago

Brady, Nyle C. The Nature and Properties of Soils. New York: Macmillan Publishing Company, 1990.

Dyfyniad MLA

Brady, Nyle C. The Nature and Properties of Soils. New York: Macmillan Publishing Company, 1990.

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