MABALA, G. K.; SETHOLE, H. Using the environment for more effective physics teaching. Southern African Journal of Environmental Education, [S. l.], v. 4, p. 20, 1987. DOI: 10.4314/sajee.v4i0.137367. Disponível em: https://www.ajol.info/index.php/sajee/article/view/137367. Acesso em: 11 oct. 2026.