Mahmood, Y., Raewf, M. and AL- Hamadany, Z. (2019) “A Study on the Perceptual Relationship between Overtime and Output”, Cihan University-Erbil Journal of Humanities and Social Sciences, 3(1), pp. 27-31. doi: 10.24086/cuejhss.v3n1y2019.pp27-31.