APA (7th ed.) Citation

Otto, J. H., & Towle, A. (1977). Modern biology. Holt.

Chicago Style (17th ed.) Citation

Otto, James H., and Albert Towle. Modern Biology. New York: Holt, 1977.

MLA (9th ed.) Citation

Otto, James H., and Albert Towle. Modern Biology. Holt, 1977.

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