Kurniadi A, Istiyono, Bakar A, Robi L, Mawardi, Emayanti. Development of a Service Technique Training Model for Volleyball for Physical Education Students of the University of Muhammadiyah Sorong. JMO [Internet]. 2025 Aug. 19 [cited 2025 Sep. 4];7(2):444-52. Available from: https://ejournal.ummuba.ac.id/index.php/pjkr/article/view/3366