APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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

Kontuz: berrikusi erreferentzia hauek erabili aurretik.