||Freud, Sigmund, 1856–1939.
||Beyond the Pleasure Principle, by Sigmund Freud; authorized translation from the second German edition by C. J. M. Hubback.
||London, Vienna: International Psycho-Analytical, 1922.
||The International Psycho-Analytical Library, edited by Ernest Jones. No. 4.
||Freud, Sigmund. Beyond the Pleasure Principle; Trans. by C. J. M. Hubback. London, Vienna: International Psycho-Analytical, 1922; Bartleby.com, 2010. www.bartleby.com/276/. [Date of Printout].