“Relationship Between Student-Centered Learning, Physical Education Dagogical Approach And Badminton Service Skill Improvement Among Senior High School Students”. COMPETITOR: Jurnal Pendidikan Kepelatihan Olahraga, vol. 17, no. 3, Oct. 2025, pp. 3477-8, https://competitor.idjournal.eu/index.php/competitor/article/view/591.