PRIETO ARRATIBEL, Amaia; BUENO-ALASTUEY, Mª Camino. 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: https://revista-hsj-filologia.unavarra.es/article/view/3097. Acesso em: 9 sep. 2025.