KURNIATI, R.; RUMTUTULY, F. . Beach pebbles as a Learning Media: A Case Study of a Prospective Elementary School Teacher . Journal of Education for Sustainability and Diversity, [S. l.], v. 3, n. 2, p. 384–397, 2025. DOI: 10.57142/jesd.v3i2.669. Disponível em: https://educationcenter.id/journal/index.php/jesd/article/view/669. Acesso em: 6 oct. 2026.