Manrique, Francisco. “Bibliografía Selectiva Sobre La educación a Distancia (1)”. International Journal of E-Learning & Distance Education / Revue internationale du e-learning et la formation à distance 7, no. 3 (December 10, 1992): 203–204. Accessed May 5, 2024. https://www.ijede.ca/index.php/jde/article/view/526.