NABABAN, M. B. PENGEMBANGAN OLAHRAGA REKREASI SUMATERA UTARA. KOLONI, [S. l.], v. 1, n. 2, p. 763–770, 2022. DOI: 10.31004/koloni.v1i2.155. Disponível em: https://koloni.or.id/index.php/koloni/article/view/155. Acesso em: 29 apr. 2026.