1. Font, X., & Lynes, J. (2018). Corporate social responsibility in tourism and hospitality. Journal of Sustainable Tourism, 26(7), 1027–1042. https://doi.org/10.1080/09669582.2018.1488856
2. Marriott. (2022). Marriott business conduct guide, p. 46, [online]. Retrieved August 04, 2022, from http://www.marriott.com/Multimedia/PDF/CorporateResponsibility/Marriott_Business_Conduct_Guide_English.pdf
3. Marsden, K., et al. (2014). Integration of biodiversity into CSR processes in tourism, p. 44, [online]. Retrieved January 14, 2024, from https://adelphi.de/system/files/mediathek/bilder/csrbiodiv-baseline_study-barrierfrei-en_final_0.pdf
4. ISO 13810:2022: Tourism and related services. Visits to industrial, natural, cultural and historical sites. Requirements and recommendations.
5. Lee, S., & Heo, C. Y. (2009). Corporate social responsibility and customer satisfaction among US publicly traded hotels and restaurants. International Journal of Hospitality Management, 28(4), 635–637. https://doi.org/10.1016/j.ijhm.2009.02.007