APA-viite (7. p.)
Peterfreund, E., Schwartz, J. T., & Klein, G. S. Psychological Issues: Information, Systems, and Psychoanalysis : An Evolutionary Biological Approach to Psychoanalytic Theory. International Universities.
Chicago-viite (17. p.)
Peterfreund, Emanuel, Jacob T. Schwartz, ja George S. Klein. Psychological Issues: Information, Systems, and Psychoanalysis : An Evolutionary Biological Approach to Psychoanalytic Theory. Nueva York, EUA: International Universities.
MLA-viite (9. p.)
Peterfreund, Emanuel, et al. Psychological Issues: Information, Systems, and Psychoanalysis : An Evolutionary Biological Approach to Psychoanalytic Theory. International Universities.
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