Roeber, Edward C., Waltz, Garry R., and Smith, Glen E. (1969). <i>A Strategy for Guidance: A Point of View and Its Implications.</i>

Lamb, E. (2012). Roeber, Edward C., Waltz, Garry R., and Smith, Glen E. (1969). <i>A Strategy for Guidance: A Point of View and Its Implications.</i>. Revue Canadienne De Counseling Et De psychothérapie, 3(4). Consulté à l’adresse https://cjc-rcc.ucalgary.ca/article/view/60672