SINAGA, E. K. .; SILALAHI, N. N. .; EPPANG, B. M. Sustainable tour operator practices: A case study of PT Destination Asia. International Journal of Applied Sciences in Tourism and Events, [S. l.], v. 9, n. 1, p. 41–55, 2025. DOI: 10.31940/ijaste.v9i1.41-55. Disponível em: https://ojs2.pnb.ac.id/index.php/IJASTE/article/view/2515. Acesso em: 4 feb. 2026.