Anh Thi Lan Mai, et al. “Factors Related to Psychological Distress Among Nursing Students Volunteering in Covid-19 Frontline Prevention In Vietnam”. Journal of Population Therapeutics and Clinical Pharmacology, vol. 30, no. 3, Mar. 2023, pp. 532-44, https://doi.org/10.47750/jptcp.2023.30.03.057.