Herrera Veloz, I. P., E. Borja Salinas, and M. D’Armas Regnault. “EVALUATION OF THE QUALITY OF SERVICES”. Universidad Ciencia Y Tecnología, Vol. 23, no. 90, Apr. 2019, p. 10, https://uctunexpo.autanabooks.com/index.php/uct/article/view/97.