1. Anderson, V., & Johnson, L. (2007). Systems thinking basics: From concepts to causal loops. Pegasus Communications Beer, S. (1984). The viable system model: Its provenance, development, methodology and pathology. The Journal of the Operational Study Society, 35(1), 7. https://doi.org/10.2307/2581927.
2. ATR (2023, January 18). La Charte éthique du Voyageur. Agir pour un tourisme responsable. Retrieved February 12, 2023, from https://www.tourisme-responsable.org/voyager-responsable/charte-ethique-voyageur/
3. Beer, S. (1984). A manager’s Guide to Organizational Structure. Wiley.
4. Bertalanffy, L. von. (1951). General system theory: A new approach to unity of science. John Hopkins Press.
5. Bhonsale, M. (2019). Religious tourism as soft power: Strengthening india’s outreach to Southeast Asia, ORF Special Report No. 97, September 2019, Observer Study Foundation.