Wardhana, Wisnu, et al. “THE EFFECTIVENESS OF THE JOYFUL LEARNING-BASED TARGET METHOD IN IMPROVING BADMINTON SERVICE RESULTS”. Jurnal Penjaskesrek, vol. 13, no. 1, Apr. 2026, pp. 67-79, https://ejournal.bbg.ac.id/index.php/penjaskesrek/article/view/3818.