DUC THANG NGUYEN; ASSOC. PROF. THI THUC NGUYEN; ASSOC. PROF. THI LAN HUONG NGUYEN; HIEN MAI. ECOTOURISM IN THANH HOA, VIETNAM. International Education and Research Journal (IERJ), [S. l.], v. 7, n. 8, 2021. Disponível em: https://ierj.in/journal/index.php/ierj/article/view/2338. Acesso em: 18 feb. 2025.