HARAHAP, P. A. S. Effective Strategies to Develop the Spirit of Nationalism in Elementary School Students Through Extracurricular Activities. International Journal of Students Education, [S. l.], v. 3, n. 1, p. 445–448, 2024. Disponível em: https://journal.berpusi.co.id/index.php/IJoSE/article/view/1113. Acesso em: 10 jul. 2025.