Hetthong, J., and B. Tongchouy. “Effects of Meditation Therapy Program towards Reducing Blood Pressure Level among Individuals with Pre-hypertensive”. Health Science Journal of Thailand, vol. 1, no. 1, Sept. 2019, pp. 43-49, https://he02.tci-thaijo.org/index.php/HSJT/article/view/197036.