Παραπομπή APA

Freud, S., & Hubback, C. J. M. (2015). Beyond the pleasure principle. Dover.

Παραπομπή Chicago Style

Freud, Sigmund, και C. J. M. Hubback. Beyond the Pleasure Principle. Newyork: Dover, 2015.

Παραπομπή MLA

Freud, Sigmund, και C. J. M. Hubback. Beyond the Pleasure Principle. Dover, 2015.