Chiriboga-Gárate, V. V., y M. V. Vega-Auquilla. «The Use of The Celta Frameworks to Foster Speaking Skills in the English Language Classroom». EPISTEME KOINONIA, vol. 5, n.º 9, enero de 2021, pp. 4-29, doi:10.35381/e.k.v5i9.1661.