APA (7th ed.) Citation

Smith, R. L. (1976). The Ecology of man: An ecosystem approach (2nd ed.). Harper & Row.

Chicago Style (17th ed.) Citation

Smith, Robert Leo. The Ecology of Man: An Ecosystem Approach. 2nd ed. New York: Harper & Row, 1976.

MLA (9th ed.) Citation

Smith, Robert Leo. The Ecology of Man: An Ecosystem Approach. 2nd ed. Harper & Row, 1976.