APA (7th ed.) Citation

Powers, W. E. (1966). Physical geography. Appleton-Century- Crofts.

Chicago Style (17th ed.) Citation

Powers, William Edwards. Physical Geography. New York: Appleton-Century- Crofts, 1966.

MLA (9th ed.) Citation

Powers, William Edwards. Physical Geography. Appleton-Century- Crofts, 1966.