Barrera Duque, Ernesto. “The Service Model of a MBA With Humanistic Approach”. Cuadernos de Administración 27, no. 45 (November 1, 2011): 123–138. Accessed January 27, 2023. https://cuadernosdeadministracion.univalle.edu.co/index.php/cuadernos_de_administracion/article/view/448.