Moolasarn, B. “The Model of Health Behavior Promoting Among Primary Hypertension Patients Without Causes in Nong Khai Province”. Journal of Research and Development Institute Rajabhat Maha Sarakham University, vol. 6, no. 1, June 2019, pp. 11-22, https://so03.tci-thaijo.org/index.php/rdirmu/article/view/211353.