1. Pan-American Health Organization: Profile of the Health Services System of Ecuador. Washington, D.C.: Author. 2001, 29.
2. Organizacion Panamericana de la Salud: Perfil del Sistema de Salud del Ecuador. Washington, DC: Author. 2008, 56.
3. Pan-American Health Organization: Analysis of Health Sector Reforms in the Andean Countries. Washington, D.C.: Author. 2002, 30.
4. Pan-American Health Organization: Health in the Americas: Ecuador. Washington, D.C.: Author. 2007, 304-321.
5. National Cancer Institute: Theory at a Glance: A Guide for Health Promotion Practice. 2005, Washington, D.C.: National Cancer Institute, 2