- American Professional Society on the Abuse of Children www.apsac.org
- Association for the Treatment of Sexual Abusers www.atsa.com
- Tri-Ess (organization for heterosexual cross-dressers) www.tri-ess.org
- U.S. Department of Justice. Dru Sjodin National Sex Offender Public Website (NSOPW) www.nsopw.gov