Kritcharoen, S. ., K. . Phon-In, J. . Kruekaew Duenke, and M. . Uttasuradee. “Factors Related to Physical Activity Among Pregnant Women”. Journal of Research in Nursing-Midwifery and Health Sciences, vol. 41, no. 4, Dec. 2021, pp. 50-59, https://he02.tci-thaijo.org/index.php/nur-psu/article/view/252525.