Michael, William B., Robert Rueda, and Pete C. Menjares. “The development and construct validation of a Spanish version of an academic self-concept scale for middle school Hispanic students from families of low socioeconomic levels”. The Spanish Journal of Psychology, vol. 3, vol. 3, 2000, p. 53, https://revistas.ucm.es/index.php/SJOP/article/view/SJOP0000110053A.