Saborío Pérez, I., & Valenzuela Arce, N. (2009). A Proposal for the Implementation of an English for Specific Purposes Specialization in a Master's Degree Program in Second Languages and Cultures with Emphasis in English as a Foreign Language. Escuela de Lenguas Modernas, Universidad de Costa Rica.

Saborío Pérez, Ileana, and Nandayure Valenzuela Arce. A Proposal for the Implementation of an English for Specific Purposes Specialization in a Master's Degree Program in Second Languages and Cultures With Emphasis in English As a Foreign Language. Escuela de Lenguas Modernas, Universidad de Costa Rica, 2009.

Saborío Pérez, Ileana, and Nandayure Valenzuela Arce. A Proposal for the Implementation of an English for Specific Purposes Specialization in a Master's Degree Program in Second Languages and Cultures With Emphasis in English As a Foreign Language. Escuela de Lenguas Modernas, Universidad de Costa Rica, 2009.