@incollection{, AF69EE54429A3FFF12BA1504D2C316E5 , author={{IbrahimBedane} and {Mahmud AbdurahmenMohammed} and {Madda Walabu University}}, journal={{Global Journal of Management and Business Research}}, journal={{GJMBR}}2249-45880975-585310.34257/GJMBR, address={Cambridge, United States}, publisher={Global Journals Organisation}2142932 } @incollection{b0, , title={{Introduction to the Economics of Financial Markets}} , journal={{James Bradfield}} , year={2007} , publisher={Oxford University Press, Inc} } @book{b1, , author={{ INBronshtein } and { KASemendyayev } and { GMusiol } and { ?HMuehlig }} , title={{Handbook of Mathematics 5th Ed}} Berlin Heidelberg , publisher={Springer-Verlag} , year={2007} } @book{b2, , title={{Operations and Supply Chain Management 13 Edition}} , author={{ F } and { RobertJacobs } and { RichardBChase } and { RhondaRLummus }} , year={2011} , publisher={McGraw-Hill Irwin} }