Gaya APA

Soils in our environment / Raymond W. Miller, Duane T. Gardiner. (2001). : Upper Saddle River, N.J. : Prentice Hall.

Gaya MLA

Soils in our environment / Raymond W. Miller, Duane T. Gardiner. 9th ed.. : Upper Saddle River, N.J. : Prentice Hall, 2001. Text.