Chatrathaisang, P. ., and D. S. . Piriyasanguanpong. “Ways of Trading on Suvarnabhumi Route”. Journal of Dhamma for Life, vol. 29, no. 4, Oct. 2023, pp. 45-59, https://so08.tci-thaijo.org/index.php/dhammalife/article/view/2472.