APA (7th ed.) Citation

Smith, R. L. (1977). Elements of ecology and field biology / (by) Robert Leo Smith. Harper and Row.

Chicago Style (17th ed.) Citation

Smith, Robert Leo. Elements of Ecology and Field Biology / (by) Robert Leo Smith. New York (etc.) ; London: Harper and Row, 1977.

MLA (9th ed.) Citation

Smith, Robert Leo. Elements of Ecology and Field Biology / (by) Robert Leo Smith. Harper and Row, 1977.

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