Kaliyaperumal, D., Y. Elango, and I. Santhanakrishnan. “Fatigue, Depression and Anxiety Among Nurses Working in Shift in a Tertiary Care Hospital in South India”. International Journal of Research in Medical Sciences, vol. 7, no. 7, June 2019, pp. 2655-9, doi:10.18203/2320-6012.ijrms20192895.