Sungkamanee, S., S. Ladawan, S. Maharan, P. Aumput, A. Srithawong, and N. Sriraksa. “Effects of aromatherapy massage with bergamot essential oil on vital sign, flexibility, stress level and stress hormone in healthy adults: a pilot study”. Archives of Allied Health Sciences, vol. 34, no. 1, Apr. 2022, pp. 1-8, https://he01.tci-thaijo.org/index.php/ams/article/view/250410.