Calles-Jiménez, Romel Francisco, Diana Casandra Paredes-Peralta, Carlos Alberto Aguirre-Alarcón, y María Eugenia Camacho-Oleas. 2024. «Communicative Activities in the Development of Oral Competence in Ecuadorian Students Compared to the Cambridge Key Exam». Revista De Ciencias Sociales 30 (junio), 19-34. https://doi.org/10.31876/rcs.v30i.42245.