APA
Koontz H. W., .Essentials of Management An International Perspective. NEW DELHI: Tata McGraw-Hill Publishing Company Limited,2007: .
Chicago
Koontz Harold/Heinz Weihrich, .Essentials of Management An International Perspective. NEW DELHI: Tata McGraw-Hill Publishing Company Limited,2007: .
Harvard
Koontz H. W., .Essentials of Management An International Perspective. NEW DELHI: Tata McGraw-Hill Publishing Company Limited,2007: .
MLA
Koontz Harold/Heinz Weihrich, .NEW DELHI: Tata McGraw-Hill Publishing Company Limited,2007: . .