Lua APA (7ú heag.)

KOONTZ, H. (1990). ESSENTIALS OF MANAGEMENT, 5TH ED. MCGRAW HILL BOOK CO.

Lua i Stíl Chicago (17ú heag.)

KOONTZ, HAROLD. ESSENTIALS OF MANAGEMENT, 5TH ED. NEW-YORK: MCGRAW HILL BOOK CO, 1990.

Lua MLA (9ú heag.)

KOONTZ, HAROLD. ESSENTIALS OF MANAGEMENT, 5TH ED. MCGRAW HILL BOOK CO, 1990.

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