Pongphoo, Thanakorn, Siriwan Rattanarasi, and Krisada Khruachalee. 2023. “Analysis of Principal Component and Clustering of Marketing Mix Factors on the Decision to Study at Sarasas Technological College”. Dusit Thani College Journal 17 (1):109-23. https://so01.tci-thaijo.org/index.php/journaldtc/article/view/267060.