HARTLEY, R. F. (1994). Management Mistakes And Successes. John Wiley & Sons.
Lua i Stíl Chicago (17ú heag.)HARTLEY, Robert F. Management Mistakes And Successes. John Wiley & Sons, 1994.
Lua MLA (8ú heag.)HARTLEY, Robert F. Management Mistakes And Successes. John Wiley & Sons, 1994.
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