PRIETO ARRATIBEL, A.; BUENO-ALASTUEY, M. C. The influence of socio-economic background, personal effort and motivation on English proficiency. Huarte de San Juan. Filología y Didáctica de la Lengua, [S. l.], n. 15, p. 43–65, 2015. Disponível em: http://revista-hsj-filologia.unavarra.es/article/view/3097. Acesso em: 5 may. 2024.