Phasathuen, Wimol, Norapol Chinuntdej, Natsapan Paopun, and Kriengkriyos Punthai. “Factors Influencing the Competitive Advantage of Thai Airfreight Forwarders”. Ph.D. in Social Sciences Journal 9, no. 3 (December 30, 2019): 830–844. Accessed March 29, 2024. https://so05.tci-thaijo.org/index.php/phdssj/article/view/153773.