APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Otto, James Howard, and Albert Towle. Modern Biology. New York: Holt, Rinehart and Winston, 1977.

MLA (9th ed.) Citation

Otto, James Howard, and Albert Towle. Modern Biology. Holt, Rinehart and Winston, 1977.