Alzate Echeverri, Margarita Maria, and Fredy Guzmán Aria. “La ética Olvidada”. Plumilla Educativa 8, no. 1 (February 24, 2011): pp. 99–112. Accessed February 24, 2026. https://revistasum.umanizales.edu.co/index.php/plumillaeducativa/article/view/486.