SASAKUL, K.; PRAYADSUP, P. . Guidelines for Improving the Service Quality of Hajj Business Operators in Bangkok. Thailand Islamic Journal, Bangkok Thailand, v. 1, n. 2, p. 7–22, 2024. Disponível em: https://so16.tci-thaijo.org/index.php/TIJ/article/view/804. Acesso em: 18 apr. 2025.