GUERRA, J. . A Comprehensive Study Of Portuguese As A Foreign Language Textbook Instructions For Writing Activities—Preliminary Results. The American Journal of Social Science and Education Innovations, [S. l.], v. 3, n. 06, p. 69–78, 2021. DOI: 10.37547/tajssei/Volume03Issue06-12. Disponível em: https://theamericanjournals.com/index.php/tajssei/article/view/171. Acesso em: 25 jul. 2025.