Penggayaan APA

GULLUY, James. (1968). Principles of geology (3). San Fransisco: W.H Freeman and Company.

Chicago Style

GULLUY, James. Principles of geology. 3 San Fransisco: W.H Freeman and Company, 1968. Buku.

MLA Style

GULLUY, James. Principles of geology. 3 San Fransisco: W.H Freeman and Company, 1968. Buku.

Turabian Style

GULLUY, James. Principles of geology. 3 San Fransisco: W.H Freeman and Company, 1968. Buku.