APA (7th ed.) Citation

Coch, N. K., & Ludman, A. (1991). Physical geology. Macmillan.

Chicago Style (17th ed.) Citation

Coch, Nicholas K., and Allan Ludman. Physical Geology. New York [u.a.]: Macmillan, 1991.

MLA (9th ed.) Citation

Coch, Nicholas K., and Allan Ludman. Physical Geology. Macmillan, 1991.

Warning: These citations may not always be 100% accurate.