กุญชร ณ อยุธยา ปิยาภรณ์, and ปานคำ สุมามาลย์. 2019. “Causal Relationship Model of Purchase Decision on Products Via Application of the Consumer in Bangkok and Its Vicinity”. Mahamakut Graduate School Journal 17 (1):137-46. https://so04.tci-thaijo.org/index.php/mgsj/article/view/212169.