Παραπομπή σε μορφή APA (7η εκδ.)

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

Παραπομπή σε μορφή Chicago (17η εκδ.)

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

Παραπομπή σε μορφή MLA (8th εκδ.)

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