Hopkins, J., & Wollheim, R. (1982). Philosophical essays on Freud. Cambridge University Press.
Lua i Stíl Chicago (17ú heag.)Hopkins, James, agus Richard Wollheim. Philosophical Essays on Freud. Cambridge: Cambridge University Press, 1982.
Lua MLA (9ú heag.)Hopkins, James, agus Richard Wollheim. Philosophical Essays on Freud. Cambridge University Press, 1982.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.