Weihrich, H., & Koontz, H. (1993). Management: A global perspective (10th ed.). McGraw-Hill.

Weihrich, Heinz, and Harold Koontz. Management: A Global Perspective. 10th ed. New York: McGraw-Hill, 1993.

Weihrich, Heinz, and Harold Koontz. Management: A Global Perspective. 10th ed. McGraw-Hill, 1993.