Sirirat Chobkhay ส. ช., Santhipharp Khamsa-ard ส. ค., and ศิริวงศ์ พ. “Strategic Development to Develop Tourism for People With Physical Disabilities and Seniors of Ubon Ratchathani Province”. Dusit Thani College Journal, vol. 12, no. 2, May 2018, pp. 63-49, https://so01.tci-thaijo.org/index.php/journaldtc/article/view/125829.