APA (7th ed.) Citation

MacDougall, M. S., & Hegner, R. W. (1943). Biology: The science of life. McGraw-Hill.

Chicago Style (17th ed.) Citation

MacDougall, Mary Stuart, and Robert William Hegner. Biology: The Science of Life. New York: McGraw-Hill, 1943.

MLA (9th ed.) Citation

MacDougall, Mary Stuart, and Robert William Hegner. Biology: The Science of Life. McGraw-Hill, 1943.