International Business ( competing in the Global Marketplace) sixth edition Charles W.L.Hill---- 20 International Business fourth edition Alan M.Rugman & Simon Collinson------- 20 Principles of Marketing Fourth edition Brassington & Pettitt -----------20 Organizational Behaviour sixth edition Andrzej A.Huczynski & David A.Buchanan ---------20 Business Research Methods second edition Bryman & Bell--------20 The management Business Logistics ( the supply chain perspective) Coyle Bardi Langley-------20