UNTONG, A. Operational Efficiency and Technology Gap Ratio of Hotels under Different Environments (in Thai). Applied Economics Journal, [S. l.], v. 20, n. 2, p. 37–54, 2013. Disponível em: https://so01.tci-thaijo.org/index.php/AEJ/article/view/14992. Acesso em: 23 may. 2022.