journal, king prajadhipok’s institute. “King Prajadhipok’s Institute Journal (September 2020 - December 2020)”. King Prajadhipok’s Institute Journal, vol. 18, no. 3, Jan. 2021, pp. 5-158, https://so06.tci-thaijo.org/index.php/kpi_journal/article/view/246839.