“The Effect of Peer Social Support and Intrinsic Motivation on Adolescents’ Physical Activity Levels”, Compet. J. Pendidik. Kepelatihan Olahraga, vol. 18, no. 1, pp. 1177–1186, Feb. 2026, Accessed: Feb. 22, 2026. [Online]. Available: https://competitor.idjournal.eu/index.php/competitor/article/view/561