ZYBERT, Jerzy. On language learner attitudes and achievement, and their relation with motivation. Scripta Neophilologica Posnaniensia, [S. l.], n. 16, p. 171–180, 2018. DOI: 10.14746/snp.2016.16.12. Disponível em: https://pressto.amu.edu.pl/index.php/snp/article/view/13389. Acesso em: 2 maj. 2024.