Villarreal-Montoya, C., A. Villalobos-Cordero, and R. Villanueva-Barbarán. “Multiplier Modality in Parent Counseling”. Revista Electrónica Educare, Vol. 18, no. 1, Jan. 2014, pp. 219-38, http://www.revistas.una.ac.cr/index.php/EDUCARE/article/view/5570.