Lopez Trejo, Maricela, Elisa Badillo Cortes, y Eloy Mata Carrillo. 2019. «: The Competitiveness of Warrior Tourism Companies Based on the National Tourism Certification System». Revista RELAYN- Micro Y Pequeña Empresa En Latinoamérica 3 (3):34-43. https://doi.org/10.46990/relayn.2019.3.3.27.