Tran, D. H., and Q. H. Pham. “Reliaty and Some Factors Affecting Nursing Manpower at 6 Hospitals in Thai Binh Province in 2017”. Journal of Nursing Science, vol. 1, no. 2, June 2018, pp. 78-83, https://www.jns.vn/index.php/journal/article/view/97.