QUESADA, Allen. A Study of the Effect of Age in the Pronunciation of English Vowels by Spanish Speakers. Kansas Working Papers in Linguistics, [S. l.], v. 23, p. 79–89, 1998. DOI: 10.17161/KWPL.1808.350. Disponível em: https://journals.ku.edu/kwpl/article/view/17250.. Acesso em: 3 may. 2024.