Cita APA (7a ed.)

Cotter, A. C. (1947). Natural species: An essay in definition and classification. Weston College Press.

Cita Chicago Style (17a ed.)

Cotter, A. C. Natural Species: An Essay in Definition and Classification. Weston, Mass.: Weston College Press, 1947.

Cita MLA (8a ed.)

Cotter, A. C. Natural Species: An Essay in Definition and Classification. Weston College Press, 1947.