Noor, A., S. Novianti, M. Suryana, and S. Amalia. “Assessing E-Business at Small and Medium-Sized Travel Agencies”. Utopía Y Praxis Latinoamericana, Vol. 25, no. 1, May 2020, pp. 176-83, https://produccioncientifica.luz.edu.ve/index.php/utopia/article/view/31890.