Sabirov Д.; Smykova М. Innovative quality management methods of hotel services. Economic series of the Bulletin of L.N. Gumilyov ENU, [S. l.], n. 2, p. 99–107, 2023. Disponível em: https://bulecon.enu.kz/index.php/main/article/view/395. Acesso em: 9 jan. 2026.