APA (7th ed.) Citation

Sanders, J. E. (1981). Principles of physical geology. Wiley.

Chicago Style (17th ed.) Citation

Sanders, John Essington. Principles of Physical Geology. New York [u.a.]: Wiley, 1981.

MLA (9th ed.) Citation

Sanders, John Essington. Principles of Physical Geology. Wiley, 1981.