Phitthayaphinant, P., & Nissapa, A. (2011). Consumers’ Satisfaction on Marketing Mix of Biodiesel in Southern Thailand: A Case Study in Songkhla, Krabi,and Trang Provinces. Kasetsart Journal of Social Sciences, 32(1), 115–124. Retrieved from https://so04.tci-thaijo.org/index.php/kjss/article/view/246722