Sayowan, Winai, Vorasith Siripornpanich, Teerut Piriyapunyaporn, Tapanee Hongratanaworakit, Naiphinich Kotchabhakdi, and Nijsiri Ruangrungsi. “The Harmonizing Effects of Citronella Oil on Mood States and Brain Activities”. Journal of Health Research 26, no. 2 (1): 69-75. Accessed April 3, 2020. https://he01.tci-thaijo.org/index.php/jhealthres/article/view/84661.