Akkhathimakul, J. ., and S. . Pongyelar. “The Monopoly of Chinese Traders: A Case Study of Coconut Traders in Paengpuay and Thanat Sub-District, Damnuen Saduak District, Ratchaburi Province”. Parichart Journal, vol. 34, no. 2, July 2021, pp. 216-32, https://so05.tci-thaijo.org/index.php/parichartjournal/article/view/244244.