Valdés Núñez, J. B. (2011). Playful method and mathematics through ITCs to practice entire numbers operations. Universidad Pedagógica y Tecnológica de Colombia.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रValdés Núñez, Juan Bautista. Playful Method and Mathematics Through ITCs to Practice Entire Numbers Operations. Universidad Pedagógica y Tecnológica de Colombia, 2011.
एमएलए (9वां संस्करण) प्रशस्ति पत्रValdés Núñez, Juan Bautista. Playful Method and Mathematics Through ITCs to Practice Entire Numbers Operations. Universidad Pedagógica y Tecnológica de Colombia, 2011.
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