Stauss, F. F., Ousley, N. K., & Carlin, A. S. (1977). Psychopathology and drug abuse: an MMPI comparison of polydrug abuse patients with psychiatric inpatients and outpatients. Addictive Behaviors, 2(1), 75–78. http://www.elsevier.com/inca/publications/store/4/7/1/index.htt