ปัทมะอุบล น., ตรีเมธสุนทร จ. and โรจน์นิรุตติกุล ณ. (2015) “Marketing Mix for Buying Decision of Car Engine oil of Car Driver in Bangkok Metropolitan”, Journal of Industrial Education, 14(2), pp. 673–679. Available at: https://ph01.tci-thaijo.org/index.php/JIE/article/view/122604 (Accessed: 29 April 2024).