Tavakolian, Mehrzad, et al. “The Effect of Relevant and Irrelevant Humor in Educational Content on the Academic Engagement of Fourth-Grade Male Students”. International Journal of Education and Cognitive Sciences, vol. 6, no. 2, Apr. 2025, pp. 1-6, https://iase-ijeas.com/index.php/ecs/article/view/ecs-2511-6411.