Bonilla Freire, Janeth, Jorge Chabusa Vargas, Grace Tello Caicedo, and Alexander Cedeño Velasco. “Marketing Challenges of Corporate Social Responsibility: Case Study of Mobile Telephone Operators in Ecuador”. Revista Universidad de Guayaquil 130, no. 1 (January 3, 2020): 39–52. Accessed April 17, 2026. https://revistas.ug.edu.ec/index.php/rug/article/view/162.