Sarwar, Aamina, and Shazia Khalid. “PERCEIVED SOCIAL SUPPORT AND WORK MOTIVATION OF DAY AND NIGHT SHIFT NURSES: Day and Night Shift Nurses: Work Motivation”. Pakistan Armed Forces Medical Journal, vol. 65, no. 2, Apr. 2015, pp. 257-61, https://www.pafmj.org/PAFMJ/article/view/844.