Phengsuk, T., Promthong, S., Kannhasin, P., Taichankong, K. and Pitiphat, S. 2025. Development of a Natural Soap from Silk Cocoon Waste and Substandard Nam Dok Mai Mangoes for Enhanced Antioxidant and Tyrosinase Inhibitory Properties: A Case Study of Rak Samunphrai Nong Waeng Sri Wilai Community Enterprise, Udon Thani. Rajapark Journal. 19, 64 (Aug. 2025), 1–21.