Melo-Guerrero, Enrique, Juan Hernández-Ortiz, Luis Manuel Valenzuela-Núñez, Ramón Valdivia-Alcalá, Araceli González-Juárez, and Juan Oswaldo Luna-Cervantes. “Willingness to Pay for Tourist Services in Los Mármoles National Park, México”. Ecosistemas y Recursos Agropecuarios 9, no. 2 (May 19, 2022). Accessed September 25, 2025. https://era.ujat.mx/index.php/rera/article/view/2858.