Sepúlveda Delgado, O., González Gutiérrez, N. R., & Aldana Bermúdez, E. (2017). Epistemological Study of the Object Group: A Piagetian Perspective in the Light of The Onto- Semiotic Approach to Mathematics Cognition. Universidad Pedagógica y Tecnológica de Colombia.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিSepúlveda Delgado, Omaida, Nelsy Rocío González Gutiérrez, এবং Eliécer Aldana Bermúdez. Epistemological Study of the Object Group: A Piagetian Perspective in the Light of The Onto- Semiotic Approach to Mathematics Cognition. Universidad Pedagógica y Tecnológica de Colombia, 2017.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিSepúlveda Delgado, Omaida, et al. Epistemological Study of the Object Group: A Piagetian Perspective in the Light of The Onto- Semiotic Approach to Mathematics Cognition. Universidad Pedagógica y Tecnológica de Colombia, 2017.
