Cita APA (7a ed.)

Orton, J. (1877). Comparative zoology: Structural and systematic. Harper.

Cita Chicago Style (17a ed.)

Orton, James. Comparative Zoology: Structural and Systematic. New York: Harper, 1877.

Cita MLA (9a ed.)

Orton, James. Comparative Zoology: Structural and Systematic. Harper, 1877.