Van Anh N, Thanh Hoa T, Anh T, Tuan L, Bang K, Bach N, Chau N. Green Tourism Market in Hanoi City: Opportunities and Challenges. GPH-IJBM [Internet]. 30May2026 [cited 31May2026];9(04):97-08. Available from: https://gphjournal.org/index.php/bm/article/view/2444