Dueñas Macías, F. A. (2013). Learner-Centered Curriculum: A Step Towards English Speaking Skill Improvement of Non-English Teachers. Universidad Pedagógica y Tecnológica de Colombia.
Čikaški stil citiranja (17. izdanje)Dueñas Macías, Fredy Alonso. Learner-Centered Curriculum: A Step Towards English Speaking Skill Improvement of Non-English Teachers. Universidad Pedagógica y Tecnológica de Colombia, 2013.
MLA način citiranja (9. izdanje)Dueñas Macías, Fredy Alonso. Learner-Centered Curriculum: A Step Towards English Speaking Skill Improvement of Non-English Teachers. Universidad Pedagógica y Tecnológica de Colombia, 2013.
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