Ruiz Badilla, Silvia. “Distance Education: Notes about Its Origins and Fair Value As a Practical and Powerful Resource for Permanent Education in Light of Intergenerational Change”. Ensayos Pedagógicos Journal (March 30, 2009): 71–86. Accessed July 17, 2024. https://www.revistas.una.ac.cr/index.php/ensayospedagogicos/article/view/5737.