วณิชย์กุล ณัฐนุช, and วิภัติภูมิประเทศ ธัญธัช. 2022. “Differentiation Strategy of Cultural Tour Service in Luang Prabang: A Case Study of Tour Eurng Luang Company Limited”. Siam University Journal of Business Administration 17 (28). Bangkok, Thailand:1-24. https://so07.tci-thaijo.org/index.php/sujba/article/view/854.