Report - 2009 856 789 ﺔﻌﻤﺎﺠﻟﺍ ﺔﻠﺠﻤ ISSN 1726 …resportal.iugaza.edu.ps/articles/د_ مروان أبو...Zimmerman, "Positive Accounting Theory", Prentice-Hall, Inc.,

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