APA (7th ed.) Citation

Gardner, J. S. (1977). Physical geography / (by) James S. Gardner. Harper's College Press.

Chicago Style (17th ed.) Citation

Gardner, James S. Physical Geography / (by) James S. Gardner. New York (etc.) ; London: Harper's College Press, 1977.

MLA (9th ed.) Citation

Gardner, James S. Physical Geography / (by) James S. Gardner. Harper's College Press, 1977.

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