Akruthai La เ. ล., Patranit Weerachaleepat ภ. ว., and Rattanawadee Patcharapuwadol ร. พ., “Green Concept as The Marketing Strategies: The Case of Royal Princess Larn Luang Hotel Bangkok”, Dusit Thani College J, vol. 11, no. special, pp. 186–197, Jul. 2018.