ALZATE, Alzate; ARISTIZÁBAL, Luz Dary; ESPINOSA, María Teresa; TOBÓN, Lía. Welcome! : An introduction to english language. [s.l.] : EAFIT Publishing House,2018. Disponível em: https://editorialeafiteduco.biteca.online/index.php/editorial/catalog/book/287. Acesso em: 7 apr. 2026.