Zuwain, A.A.A.K., Al-Khalidi, K.A.-I. and Al-Assadi, M.S.M. (2022) “Analysis of sales activity and its role in measuring productivity for premium class hotels”, Al-Ghary Journal of Economic and Administrative Sciences, 18(00), pp. 2205–2220. doi:10.36325/ghjec.v18i00.15217.