APA (7e ed.) Bronvermelding

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.

Chicago (17e ed.) Bronvermelding

Sepúlveda Delgado, Omaida, Nelsy Rocío González Gutiérrez, en 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.

MLA (9e ed.) Bronvermelding

Sepúlveda 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.