Pitoyo, M. D., S. Sumardi, and A. Asib. “GAMIFICATION BASED ASSESSMENT: A TEST ANXIETY REDUCTION THROUGH GAME ELEMENTS IN QUIZIZZ PLATFORM”. International Online Journal of Education and Teaching, vol. 6, no. 3, July 2019, pp. 456-71, https://iojet.org/index.php/IOJET/article/view/626.