Xiao, Han, Yan Zhang, Desheng Kong, Shiyue Li dan Ningxi Yang. 2020. The Effects of Social Support on Sleep Quality of Medical Staff Treating Patients with Coronavirus Disease 2019 (Covid 19) in January and February 2020 in China. Medical Science Monitor Journal, e-ISSN 1643-3750. https://dx.doi.org/10.12659%2FMSM.923549