BAKAR, R. . The Effect of Learning Motivation on Student?s Productive Competencies in Vocational High School, West Sumatra. International Journal of Asian Social Science, [S. l.], v. 4, n. 6, p. 722–732, 2014. Disponível em: https://archive.aessweb.com/index.php/5007/article/view/2672. Acesso em: 21 may. 2024.