Booranawong, T. ., S. . Theerachun, and T. . Sampim. “New Value Chain Analysis and Income Distribution Measurement of Khanom La Products in Nakhon Si Thammarat Province”. Suan Dusit Graduate School Academic Journal, vol. 18, no. 2, June 2022, pp. 139-55, https://so19.tci-thaijo.org/index.php/SDUGSAJ/article/view/264.