Kirdmalai, N., Vaseenonta, C., Nueangsittha, N., Pujit, P., Niljinda, S. and Junthanon, J. (2024) “Research and Production of Serum Products Derived from Indigo Extract, together with a Detailed Examination of the Associated Commercial Costs. The Organic Herbal Herb Seangchan Community Enterprise Group is Situated in Sakon Nakhon Province”, Rajapark Journal. Bangkok, Thailand, 18(61), pp. 163–179. available at: https://so05.tci-thaijo.org/index.php/RJPJ/article/view/275235 (accessed: 30 August 2026).