Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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