Dyfyniad APA

Weil, R. R. (2017). The nature and properties of soils. Harlow, England: Pearson.

Dyfyniad Arddull Chicago

Weil, Ray R. The Nature and Properties of Soils. Harlow, England: Pearson, 2017.

Dyfyniad MLA

Weil, Ray R. The Nature and Properties of Soils. Harlow, England: Pearson, 2017.

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