Vivas Silva, C. J., Murillo Chiquillo, Z. L., & Cristancho Chinome, J. R. (2017). Scratch. Didactic strategy to learn the multiplication table in new school. Universidad Pedagógica y Tecnológica de Colombia.
Čikaški stil citiranja (17. izdanje)Vivas Silva, Carlos Julio, Zulma Lucía Murillo Chiquillo, i Jaime Ricardo Cristancho Chinome. Scratch. Didactic Strategy to Learn the Multiplication Table in New School. Universidad Pedagógica y Tecnológica de Colombia, 2017.
MLA način citiranja (9. izdanje)Vivas Silva, Carlos Julio, et al. Scratch. Didactic Strategy to Learn the Multiplication Table in New School. Universidad Pedagógica y Tecnológica de Colombia, 2017.
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