Fierro-Sánchez, V., W. Romero-Black, and N. . Mora-Sanchez. “Customer Service in the Provision of Banking Services: Case Cooperative of Savings and Credit Jardin Azuayo De Machala ”. 593 Digital Publisher CEIT, vol. 8, no. 3, May 2023, pp. 420-7, doi:10.33386/593dp.2023.3.1760.