Napa, R., I. Ichsan, A. Kasmawati, and S. Tarrapa. “Trends and Challenges in Indonesian Tourism Policy (2016–2025): A Systematic Literature Review”. PPSDP International Journal of Education, vol. 4, no. 2, Dec. 2025, pp. 1456-72, doi:10.59175/pijed.v4i2.817.