APA (7th ed.) Citation

Spencer, E. W. (1990). Physical geology. Addison-Wesley Pub. Co..

Chicago Style (17th ed.) Citation

Spencer, Edgar Winston. Physical Geology. Reading, Mass.: Addison-Wesley Pub. Co., 1990.

MLA (9th ed.) Citation

Spencer, Edgar Winston. Physical Geology. Addison-Wesley Pub. Co., 1990.