P. Kosasaeng and J. . Pokawin, “Indigo Dyeing Product Development and Marketing Promotion of Indigo Dyeing Products of Natural Dyeing Weaving Group at Ban Phanna, Phanna Sub-district, Sawang Daen Din District, Sakon Nakhon Province”, pnujrhuso, vol. 9, no. 1, pp. 91–113, Jan. 2022.