Cita APA

Bermejo Fernández, V., & Díaz, J. J. (2007). The Degree of Abstraction in Solving Addition and Subtraction Problems.

Citación estilo Chicago

Bermejo Fernández, Vicente, y Juan José Díaz. The Degree of Abstraction in Solving Addition and Subtraction Problems. 2007.

Cita MLA

Bermejo Fernández, Vicente, y Juan José Díaz. The Degree of Abstraction in Solving Addition and Subtraction Problems. 2007.