NIU, R.; CHEN, Y.; WU, J. L2 learners’ pronunciation of English phonetic sounds: An acoustic analysis with software Praat. International journal of linguistics, literature and culture, [S. l.], v. 9, n. 5, p. 209–225, 2023. DOI: 10.21744/ijllc.v9n5.2363. Disponível em: https://sloap.org/journals/index.php/ijllc/article/view/2363. Acesso em: 4 jul. 2025.