Garkuff, R. R., and Anthony, W. A. (1979). <i>Helping: An Introduction to Counselling Skills</i>.

Holder, T. (2012). Garkuff, R. R., and Anthony, W. A. (1979). <i>Helping: An Introduction to Counselling Skills</i>. Revue Canadienne De Counseling Et De psychothérapie, 14(2). Consulté à l’adresse https://cjc-rcc.ucalgary.ca/article/view/60325