Gaya APA

WEIL, R, R., Brady, N, C. (2017). The Nature and properties of soils (5th. ed.). New Delhi: Pearson Education.

Gaya MLA

WEIL, Ray, R.., Brady, Nyle, C. "The Nature and properties of soils". 5th. ed. New Delhi: Pearson Education, 2017. Buku.