1. Abramson, L. Y., Metalsky, G. I., & Alloy, L. B. (1989). Hopelessness depression: a theory-based subtype of depression. Psychological Review, 96, 358–372.
2. Adlaf, E. M., & Paglia-Boak, A. (2007). The Ontario Student Drug Use and Health Survey (OSDUHS). Toronto: Centre for Addiction and Mental Health.
3. Cloninger, C., Sigvardsson, S., & Bohman, M. (1996). Type I and type II alcoholism: an update. Alcohol Health and Research World, 20, 18–23.
4. Cohen, J. (1988). Statistical power analysis for the behavioral sciences (2nd ed.). Mahwah: Erlbaum.
5. Cohen, J. (1992). A power primer. Psychological Bulletin, 112, 155–159.