Castro Pérez, M., Ruiz Guevara, L. S., León Sáenz, A. T., Fonseca Solórzano, H., Díaz Forbice, M., & Umaña Fernández, W. (2010). Factores académicos en la transición de la primaria a la secundaria: Motivación, rendimiento académico y disciplina / Academic factors in the transition from elementary school to middle school: motivation, academic performance and discipline. Universidad de Costa Rica.

Castro Pérez, Marianella, Lillian Susana Ruiz Guevara, Ana Teresa León Sáenz, Hilda Fonseca Solórzano, Mirta Díaz Forbice, and Willie Umaña Fernández. Factores Académicos En La Transición De La Primaria a La Secundaria: Motivación, Rendimiento Académico Y Disciplina / Academic Factors in the Transition From Elementary School to Middle School: Motivation, Academic Performance and Discipline. Universidad de Costa Rica, 2010.

Castro Pérez, Marianella, et al. Factores Académicos En La Transición De La Primaria a La Secundaria: Motivación, Rendimiento Académico Y Disciplina / Academic Factors in the Transition From Elementary School to Middle School: Motivation, Academic Performance and Discipline. Universidad de Costa Rica, 2010.