Kharisma, Yudhi, et al. “Enhancing Lower Passing, Confidence, and Motivation through Cooperative Learning: The Impact of Team Game Tournaments in Volleyball Learning”. Edu Sportivo: Indonesian Journal of Physical Education , vol. 6, no. 1, Apr. 2025, pp. 42-51, doi:10.25299/esijope.2025.vol6(1).18885.