Cita APA (7th ed.)

Nason, A., & DeHaan, R. L. (1973). The biological world. Wiley.

Cita Chicago (17th ed.)

Nason, Alvin, i Robert L. DeHaan. The Biological World. New York: Wiley, 1973.

Cita MLA (8th ed.)

Nason, Alvin, i Robert L. DeHaan. The Biological World. Wiley, 1973.