APA (7 वां संस्करण) प्रशस्ति पत्र

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.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Sierra 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.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Sierra 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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