AYLIFF, D. . . Researching the effects of teaching grammar rules to English second language adult learners . South African Journal of Higher Education, [S. l.], v. 25, n. 3, 2011. DOI: 10.20853/25-2-5501. Disponível em: https://www.journals.ac.za/sajhe/article/view/5501. Acesso em: 7 oct. 2025.