Martínez Contreras, María Stella, and Francisco Moreno Castrillón. 2004. “Textual Organization of Request Letters in Spanish and English and of Request Memoranda in Spanish: An Exploratory Study”. Íkala, Revista De Lenguaje Y Cultura 9 (1):83-102. https://doi.org/10.17533/udea.ikala.3143.