Koontz, H. (2007). Essentials of Management: An International Perspective. McGraw Hill.
Lua i Stíl Chicago (17ú heag.)Koontz, Harold. Essentials of Management: An International Perspective. New Delhi: McGraw Hill, 2007.
Lua MLA (9ú heag.)Koontz, Harold. Essentials of Management: An International Perspective. McGraw Hill, 2007.
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