1. Adam, B. D. (1987). The rise of the gay and lesbian movement. Boston: Twayne.
2. American Psychiatric Association. (1980). Diagnostic and statistical manual of mental disorders (3rd ed.). Washington, DC: Author.
3. American Psychological Association. (1999). Enhancing your interactions with people with disabilities. Retrieved February 20, 2007, from the American Psychological Association website: http://www.apa.org/pi/disability/enhancing.html
4. American Psychological Association. (2000). Guidelines for psychotherapy with lesbian, gay, and bisexual clients. American Psychologist, 55, 1440–1451.
5. Appleby, Y. (1994). Out in the margins. Disability & Society, 9, 19–32.