VU THI MINH HIEN; PHAM VAN DUNG; TRAN KIM LOAN. Assessment of customers’ satisfaction with helicopter tour services for sightseeing at Ha Long Bay. VNU JOURNAL OF ECONOMICS AND BUSINESS, [S. l.], v. 3, n. 1, p. 59, 2023. DOI: 10.57110/jebvn.v3i1.163. Disponível em: https://jebvn.ueb.edu.vn/index.php/jeb/article/view/163. Acesso em: 2 aug. 2025.