American Psychiatric Association. (2000). Diagnostic and statistical manual of mental disorders, text revision (4th ed.). Washington, DC: Author.
Annual Report of the Administrator of Veteran's Affairs (1931). U.S. Government Printing Office,
Asch, S.M., McGlynn, E.A., Hogan, R.A., Haywardm P., Shekelle, L.R (2004). Comparison of quality of care for patients in the veterans Health Administration and patients in a national sample. Annals of Internal Medicine, 141(12), 938-945.
Backus, L.I., Boothroyd, D., & Deyton, L.R. (2005). HIV, hepatitis C and HIV/hepatitis C virus co-infection in vulnerable populations. AIDS, 19(suppl. 3), 513-519.