ส่งศรีสำรวย. 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), 59-68. https://he02.tci-thaijo.org/index.php/ubruphjou/article/view/162783.