Παραπομπή APA

Gilluly, J., Water, A. C., & Woodford, A. O. (1968). Principles of geology. W H Freeman and Company.

Παραπομπή Chicago Style

Gilluly, J., A C. Water, και A O. Woodford. Principles of Geology. London: W H Freeman and Company, 1968.

Παραπομπή MLA

Gilluly, J., et al. Principles of Geology. W H Freeman and Company, 1968.