Maury Mena SC, Rosanía Mendoza CD, Ucrós Zapata LC, De Ávila Pérez DM. Difficulties in the Pronunciation of English Vowel Sounds in Sixth Grade Spanish-Speaking Students in Barranquilla, Colombia. penamer [Internet]. 2025 Jun. 27 [cited 2025 Oct. 5];18(36):e-897. Available from: https://publicaciones.americana.edu.co/index.php/pensamientoamericano/article/view/897