Valdés Núñez, J. B. (2011). Playful method and mathematics through ITCs to practice entire numbers operations. Universidad Pedagógica y Tecnológica de Colombia.
芝加哥风格引文Valdés Núñez, Juan Bautista. Playful Method and Mathematics Through ITCs to Practice Entire Numbers Operations. Universidad Pedagógica y Tecnológica de Colombia, 2011.
MLA引文Valdés Núñez, Juan Bautista. Playful Method and Mathematics Through ITCs to Practice Entire Numbers Operations. Universidad Pedagógica y Tecnológica de Colombia, 2011.
警告：这些引文格式不一定是100％准确.
