Supapunt, Patcharin, Patcharee Intanoo, and Sanwasan Yodkhum. “Factor Affecting Marketing Mix of Purchasing for Processed Products from Agricultural Residues in Chiang Mai and Lamphun Provinces”. Trends of Humanities and Social Sciences Research 11, no. 1 (May 23, 2023): 306–331. accessed April 24, 2025. https://so03.tci-thaijo.org/index.php/Humanties-up/article/view/263829.