Klankaew, Amornwan, and Natcha Krimjai. “Strengthening of business administration and medium-sized enterprises in export of gems and jewelry industry in Bangkok and vicinity”. Journal of Management Science Nakhon Pathom Rajabhat University 3, no. 2 (November 27, 2018): 29–43. accessed August 29, 2026. https://so03.tci-thaijo.org/index.php/JMSNPRU/article/view/157303.