Sierra Roberto, J. D. F. (2012). Perspectives and development sceneries for rural communities: A study case in Sora, Boyacá, Colombia. Universidad Pedagógica y Tecnológica de Colombia.
Chicago Style (17. basım) AtıfSierra Roberto, José Darío Frailander. Perspectives and Development Sceneries for Rural Communities: A Study Case in Sora, Boyacá, Colombia. Universidad Pedagógica y Tecnológica de Colombia, 2012.
MLA (9th ed.) AtıfSierra Roberto, José Darío Frailander. Perspectives and Development Sceneries for Rural Communities: A Study Case in Sora, Boyacá, Colombia. Universidad Pedagógica y Tecnológica de Colombia, 2012.
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