Koontz, H. (2018). Essentials of Management (10th.). McGraw Hill.
Lua i Stíl Chicago (17ú heag.)Koontz, Harold. Essentials of Management. 10th. McGraw Hill, 2018.
Lua MLA (9ú heag.)Koontz, Harold. Essentials of Management. 10th. McGraw Hill, 2018.
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