Mantilla, Marcia, y Christian Andrade. «CONTENT-BASED INSTRUCTION STRATEGIES TO IMPROVE ENGLISH MAJOR STUDENTS´ L2 WRITING SKILLS COMMAND: Productive Skills Development ». Revista Ecos De La Academia, vol. 6, n.º 11, febrero de 2021, pp. 33-49, http://948545.elmit.asia/index.php/ecosacademia/article/view/283.