Kannasoot, A. “Packaging Design to Increase the Value for Gold Face Mask Product of Kusuma : OTOP Herbal Product Manufacturer, Bangkok, Thailand”. University of the Thai Chamber of Commerce Journal Humanities and Social Sciences, vol. 39, no. 4, Dec. 2019, pp. 69-88, https://so06.tci-thaijo.org/index.php/utccjournalhs/article/view/205736.