Chandee, K., Chinantdej, N., Paopun, N., & Chiarakul, T. (2021). Factors Driving Marketing Mix and Customer Relationship Management Affecting Performance of Outdoor Billboard Businesses in Thailand. Ph.D. In Social Sciences Journal, 11(3), 775–788. Retrieved from https://so05.tci-thaijo.org/index.php/phdssj/article/view/201610