References:
Colenso, M., 1998, Strategic skills for line managers, Butterworth-Heinemann
Erven, B.L., Planning, Ohio State University, 1999, http://www.ag.ohio-state.edu/~mgtexcel/Planning.html last accessed on November 16, 2010
Gitman, L.J., McDaniel, C., 2008, the future of business: the essentials, 4th edition, Cengage Learning
McShane, S.L., Travaglione, T., 2005, Organizational behavior on the Pacific rim, McGraw-Hill