MLA

Weil, Ray R, and Nyle C Brady. The Nature and Properties of Soils. Fifteenth edition. Upper Saddle River: Pearson, 2017.

APA

Weil, R. R, & Brady, N. C. (2017). The nature and properties of soils. Fifteenth edition. Upper Saddle River: Pearson.

Chicago

Weil, Ray R., and Nyle C Brady. The Nature and Properties of Soils. Fifteenth edition. Upper Saddle River: Pearson, 2017.