Gaya APA

Gilluly, J. (1968). Principles of geology / by james Gilluly,Aaron C.Waters and A.O.Woodford (3 ed.). : W.H. Freeman.

Gaya MLA

Gilluly, James. "Principles of geology / by james Gilluly,Aaron C.Waters and A.O.Woodford". 3 ed. : W.H. Freeman, 1968. Referensi.