References:
Carmel, E., Tija, P., 2005, Offshoring Information Technology: Sourcing and Outsourcing to a Global Workforce, Cambridge University Press, ISBN 0521843553
Gottschalk, P., Solli-Saether, H., 2005, Critical Success Factors: From it Outsourcing Theories: An Empirical Study, Industrial Management and Data Systems, Vol. 105, No. 6
Savvas, a., 2008, Unilever Extends IBM Procurement Outsourcing Contract, Computer Weekly, http://www.computerweekly.com/Articles/2008/01/02/228696/unilever-extends-ibm-procurement-outsourcing-contract.htm last accessed on May 13, 2010
Schniederjans, M.J., Schniederjans, a.M., Schniederjans, D.G., 2005, Outsourcing and Insourcing in an International Context, M.E. Sharpe, ISBN 076561586X