Khalef, A., Hussein, A. (2014). Impact of waste of time on the cost of the service. Alustath, 6(12), 63-83.
Awath Khalef; Adele Hussein. "Impact of waste of time on the cost of the service". Alustath, 6, 12, 2014, 63-83.
Khalef, A., Hussein, A. (2014). 'Impact of waste of time on the cost of the service', Alustath, 6(12), pp. 63-83.
Khalef, A., Hussein, A. Impact of waste of time on the cost of the service. Alustath, 2014; 6(12): 63-83.


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