ZUMBACH, JOERG, and PETER SPRAUL. “THE ROLE OF EXPERT AND NOVICE TUTORS IN COMPUTER MEDIATED AND FACE-TO-FACE PROBLEM-BASED LEARNING”. Research and Practice in Technology Enhanced Learning 2, no. 2 (July 1, 2007): 105–129. Accessed November 25, 2024. https://rptel.apsce.net/index.php/RPTEL/article/view/2007-02007.