Niwasanon, R., P. . Arunyaphark, and W. . Parai. “Knowledge, Self-Care Behavior and Psychological Effects of Pregnant Women in the Pandemic of the 2019 Novel Coronavirus Disease (COVID-19)”. Journal of Nursing, Siam University, vol. 24, no. 46, July 2023, pp. 34-48, https://he01.tci-thaijo.org/index.php/nursingsiamjournal/article/view/262867.