Siregar, S., Kasih, I. and Pardilla, H. (2022) “The Effectiveness of E-Learning-Based Volleyball Service Video Media on Students Affected by Covid-19 at Faculty of Sports Science, Universitas Negeri Medan”, Physical Education Theory and Methodology, 22(1), pp. 7–13. doi: 10.17309/tmfv.2022.1.01.