Παραπομπή APA

Hays, P. (1964). New horizons in psychiatry. Penguin.

Παραπομπή Chicago Style

Hays, P. New Horizons in Psychiatry. New Delhi: Penguin, 1964.

Παραπομπή MLA

Hays, P. New Horizons in Psychiatry. Penguin, 1964.