ส่งศรีส. (2018) “Effects of laughter yoga exercises to reduce stress of the second year nursing student of Ubon Ratchathani Rajabhat University”, UBRU Journal for Public Health Research, 7(1), pp. 59-68. Available at: https://he02.tci-thaijo.org/index.php/ubruphjou/article/view/162783 (Accessed: 12August2020).