Kongpatanakul, S., P. Somhom, U.- sa Panichpathompong, P. Supatchaipisit, and S. Limcharoensuk. “Physicians’ Attitudes toward Pharmaceutical Sales Representatives”. Journal of Basic and Applied Pharmacology, vol. 19, no. 1, July 2015, pp. 23-32, https://li01.tci-thaijo.org/index.php/JBAP/article/view/36988.