Barrera, H. F. (2021). Problem-solving, Numerical and Variational Thinking in Elementary School: A Review. Universidad Pedagógica y Tecnológica de Colombia.
芝加哥风格引文Barrera, Hugo Fernando. Problem-solving, Numerical and Variational Thinking in Elementary School: A Review. Universidad Pedagógica y Tecnológica de Colombia, 2021.
MLA引文Barrera, Hugo Fernando. Problem-solving, Numerical and Variational Thinking in Elementary School: A Review. Universidad Pedagógica y Tecnológica de Colombia, 2021.
警告：这些引文格式不一定是100％准确.
