Sawangrat, N. “Evaluation of Expected Service Quality Compared With Perceived Service Quality to Develop Quality and Sustainable Tourist Attractions for the Agro Tourism Industry in Rayong Province, Thailand”. Ph.D. In Social Sciences Journal, vol. 8, no. 3, Dec. 2018, pp. 53-66, https://so05.tci-thaijo.org/index.php/phdssj/article/view/101603.