AZIZ, Muhammad Fauzan; HASIBUAN, Muchtar Hendra; PRABOWO, Eko. Efektifitas Tekhnik PNF Hold Relax dan Contract Relax Terhadap Peningkatan Fleksibilitas Otot Pinggang Atlet Tim Nasional Judo. Jurnal Olahraga Kebugaran dan Rehabilitasi (JOKER), [S. l.], v. 3, n. 2, p. 152–157, 2023. DOI: 10.35706/joker.v3i2.9993. Disponível em: https://journal.unsika.ac.id/index.php/joker/article/view/9993. Acesso em: 5 des. 2025.