“Integrating the Islamic Religious Education Curriculum and Extracurricular Development To Improve Achievement: A Systematic Literature Review”. COMPETITOR: Jurnal Pendidikan Kepelatihan Olahraga 18, no. 2 (May 10, 2026): 3026–3035. Accessed May 30, 2026. https://competitor.idjournal.eu/index.php/competitor/article/view/752.