KOONTZ, H. (1976). Management: Systems And Contingency Analysis Of Managerial Functions Harold Koontz And Cyril O' Donnell. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)KOONTZ, Harold. Management: Systems And Contingency Analysis Of Managerial Functions Harold Koontz And Cyril O' Donnell. McGraw-Hill, 1976.
Lua MLA (8ú heag.)KOONTZ, Harold. Management: Systems And Contingency Analysis Of Managerial Functions Harold Koontz And Cyril O' Donnell. McGraw-Hill, 1976.
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