Sangwiman , Nasreen, and Watcharapoj Sapsanguanboon. “Types of Sales Promotion Influencing the Product Buying of Modern Trade Drug Store in Bangkok”. Business Review Journal 12, no. 2 (December 25, 2020): 36–49. Accessed March 29, 2024. https://so01.tci-thaijo.org/index.php/bahcuojs/article/view/179209.