1. Abell, D. 1980. Defining the business: The starting point of strategic planning. Englewood Cliffs, NJ: Prentice-Hall Inc.
2. Aghion, P., and J. Tirole. 1997. Formal and real authority in organizations. Journal of Political Economy 1–29.
3. Amit, R., and C. Zott. 2001. Value creation in e-business. Strategic Management Journal 22: 493–520.
4. Ansoff, H. 1965. Corporate strategy: An analytic approach to business policy for growth and expansion. New York: McGraw-Hill.
5. Aosa, E. 1992. An Empirical Investigation of Strategy Formulation and Implementation with Large Private Manufacturing Companies in Kenya, Unpublished PhD thesis, University of Strathclude, Scotland.