APA (7th ed.) Citation

Smith, E. T. (1943). Exploring biology (New ed.). Harcourt.

Chicago Style (17th ed.) Citation

Smith, Ella Thea. Exploring Biology. New ed. New York: Harcourt, 1943.

MLA (8th ed.) Citation

Smith, Ella Thea. Exploring Biology. New ed. Harcourt, 1943.