Suwandee, S., and R. Kamwachirapitak. “Strategies for Manpower Planning and Development in the Contemporary World at Kasem Bundit University”. KASEM BUNDIT JOURNAL, vol. 19, no. 2, Dec. 2018, pp. 1-11, https://so04.tci-thaijo.org/index.php/jkbu/article/view/160574.