Plastic-Free Tourism Initiatives and Behavioral Change: Evaluating Policy Effectiveness in Indonesian National Parks. HARMONI: Journal of Sustainable & Responsible Tourism, [S. l.], v. 1, n. 01, p. 97–112, 2026. Disponível em: https://harmonijournal.com/index.php/harmoni/article/view/7. Acesso em: 30 may. 2026.