Duangkaew, K., K. Homjun, W. Fankam-ai, S. Kaewsirirung, and N. Ketui. “Marketing Mix Factors in Purchasing Decisions and the Accuracy of Predicting Nan OTOP Products Purchasing Behavior by Artificial Intelligence Technology”. Journal of Management Sciences Suratthani Rajabhat University, vol. 12, no. 2, Dec. 2025, pp. 389-20, https://so03.tci-thaijo.org/index.php/msj/article/view/270252.