Higuera-Martinez, O. I. (2017). Student dropout in Colombia and the engineering programs of the Uptc campus Sogamoso. Universidad Pedagógica y Tecnológica de Colombia - UPTC.
Chicago-viite (17. p.)Higuera-Martinez, Oscar Ivan. Student Dropout in Colombia and the Engineering Programs of the Uptc Campus Sogamoso. Universidad Pedagógica y Tecnológica de Colombia - UPTC, 2017.
MLA-viite (9. p.)Higuera-Martinez, Oscar Ivan. Student Dropout in Colombia and the Engineering Programs of the Uptc Campus Sogamoso. Universidad Pedagógica y Tecnológica de Colombia - UPTC, 2017.
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