Pulido Cortés, Ó., & Acuña Rodríguez, O. Y. (2014). From the university of professions to the university for development 1953 – 1974. Universidad Pedagógica y Tecnológica de Colombia.
Čikaški stil citiranja (17. izdanje)Pulido Cortés, Óscar, i Olga Yaneth Acuña Rodríguez. From the University of Professions to the University for Development 1953 – 1974. Universidad Pedagógica y Tecnológica de Colombia, 2014.
MLA način citiranja (9. izdanje)Pulido Cortés, Óscar, i Olga Yaneth Acuña Rodríguez. From the University of Professions to the University for Development 1953 – 1974. Universidad Pedagógica y Tecnológica de Colombia, 2014.
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