Thonglae, A., and W. Chinnasri. “GUIDELINES FOR STRENGTHENING COOPERATION IN SUSTAINABLE ECOTOURISM DEVELOPMENT: A CASE STUDY OF KAENG KRACHAN DISTRICT, PHETCHABURI PROVINCE”. Journal of MCU Phetchaburi Review, vol. 8, no. 3, Dec. 2025, pp. 370-83, https://so03.tci-thaijo.org/index.php/JPR/article/view/294251.