Sigmund Freud, James Strachey (2001). “Totem and Taboo: Some Points of Agreement Between the Mental Lives of Savages and Neurotics”, p.31, Psychology Press
Sigmund Freud, James Strachey, Anna Freud, Carrie Lee Rothgeb (1958). “The Standard Edition of the Complete Psychological Works of Sigmund Freud: The case of Schreber, papers on technique and other works”