Jaramillo Cardona, G., Naranjo, J. A. and González Rátiva, M. C. (2011) “The International Certification System for Spanish as a Foreign Language in Antioquia (Colombia): Experience and Perspective”, Íkala, Revista de Lenguaje y Cultura, 16(2), pp. 201–227. doi: 10.17533/udea.ikala.7971.