Wright, P. L., Kroll, M. J., & Parnell, J. A. (1998). Strategic management: Concepts (fourth edition.). Prentice Hall.

Wright, Peter L., Mark J. Kroll, and John A. Parnell. Strategic Management: Concepts. fourth edition. Upper Saddle River, NJ: Prentice Hall, 1998.

Wright, Peter L., et al. Strategic Management: Concepts. fourth edition. Prentice Hall, 1998.