1. Bansal, S. P. (n.d.). Tour guiding essentials. Jurnal Pendidikan Dan Pembelajaran Bahasa Indonesia. Retrieved from https://epgp.inflibnet.ac.in/epgpdata/
2. uploads/epgp_content/S001827/P001855/M030280/ET/15260345799.14_ET.pdf, 12 December 2022.
3. Brito, L. M., & Carvalho, C. (2022). Interpretation performed by certified tourist guides in Lisbon during the pandemic: a case study. International Journal of Tour Guiding Research, 3(1), 65-80.
4. Brumelis, O. (2023). How often should you travel? Retrieved from https://www.clever
5. journey.com/how-often-should-you-travel/, 26 January 2023.