Raymond J. Corsini: The Dictionary of Psychology. Philadelphia: Brunner-Routledge, 2002, s. p. 224. ISBN 1-58391-328-9. OCLC48932974.
Rudy Flora: How to Work with Sex Offenders: A Handbook for Criminal Justice, Human Service, and Mental Health Professionals. New York: Haworth Clinical Practice Press, 2001, s. p. 91. ISBN 0-7890-1499-8. OCLC45668958.