วณิชย์กุล ณ, วิภัติภูมิประเทศ ธ. Differentiation Strategy of Cultural Tour Service in Luang Prabang: A Case Study of Tour Eurng Luang Company Limited. sujbr [internet]. 2022 Mar. 27 [cited 2025 Jun. 29];17(28):1-24. available from: https://so07.tci-thaijo.org/index.php/sujba/article/view/854