APA (7th ed.) Citation

Gilluly, J., Waters, A. C., & Woodford, A. (1975). Principles of geology (Fouth edition.). W.H. Freeman.

Chicago Style (17th ed.) Citation

Gilluly, James, Aaron C. Waters, and A.O Woodford. Principles of Geology. Fouth edition. San Francisco, California: W.H. Freeman, 1975.

MLA (9th ed.) Citation

Gilluly, James, et al. Principles of Geology. Fouth edition. W.H. Freeman, 1975.