1. American Psychological Association (2005). Policy statement on evidence-based practice in psychology. Policy adopted by APA council of representatives, August, 2005. Retrieved December 28, 2008 from http://www.apa.org/practice/ebreport.pdf.
2. American Psychological Association has many relevant policies that affirm LGBT lives and relationships. They can be retrieved at http://www.apa.org/pi/lgbt/index.aspx.
3. Handbook of counseling and psychotherapy with lesbian, gay, bisexual, and transgender clients,2007
4. Psychological perspectives on lesbian, gay, and bisexual experiences.,2003
5. Affirmative psychotherapy with lesbians and gay men.,2002