SIAGIAN, roy; NATHANAEL SITANGGANG; M. JOHARIS LUBIS. Project-Based Learning Governance on Natural Materials Improving the Creativity of Class VIII Students of SMP Negeri 1 Sigumpar. Education and Human Development Journal, [S. l.], v. 7, n. 2, p. 77–84, 2022. DOI: 10.33086/ehdj.v7i2.2964. Disponível em: https://journal2.unusa.ac.id/index.php/EHDJ/article/view/2964. Acesso em: 5 may. 2024.