Weihrich, H., & Koontz, H. (2013). Management: A global, innovative and entrepreneurial perspective (14th ed.). McGraw-Hill.

Weihrich, Heinz, and Harold Koontz. Management: A Global, Innovative and Entrepreneurial Perspective. 14th ed. New York : New Delhi: McGraw-Hill, 2013.

Weihrich, Heinz, and Harold Koontz. Management: A Global, Innovative and Entrepreneurial Perspective. 14th ed. McGraw-Hill, 2013.