DeWit, D. J., Steep, B., Silverman, G., Stevens-Lavigne, A., Ellis, K., Smythe, C., Rye, B. J., Braun, K. and Wood, E. (2000) “Evaluating an In-School Drug Prevention Program for At-Risk Youth”, Alberta Journal of Educational Research, 46(2). doi: 10.11575/ajer.v46i2.54803.