Thasanoh Elter , P. ., P. . Jaigarun, and S. Siriphan. “Historical Research Methodology in Nursing”. Nursing Journal of The Ministry of Public Health, vol. 30, no. 1, Apr. 2020, pp. 1-13, https://he02.tci-thaijo.org/index.php/tnaph/article/view/241484.