Dias, P. “INDIVIDUALIZED INSTRUCTION AND LEARNING (Editors: Maclan Mohan and Ronald E. Hull); THE KELLER PLAN HANDBOOK: ESSAYS ON A PERSONALIZED SYSTEM OF INSTRUCTION (Authors: Fred S. Keller and J. Gilmour Sherman); PSI PERSONALIZED SYSTEM OF INSTRUCTION: 41 GERMINAL PAPERS (Editor: J. Gilmour Sherman)”. McGill Journal of Education / Revue Des Sciences De l’éducation De McGill, vol. 11, no. 001, Apr. 1976, https://mje.mcgill.ca/article/view/7083.