HELLER ROBERT. (2004). COMPLETE GUIDE TO MODERN MANAGEMENT. JAICO PUBLISHING HOUSE.
Chicago-čujuhus (17. p.)HELLER ROBERT. COMPLETE GUIDE TO MODERN MANAGEMENT. MUMAI: JAICO PUBLISHING HOUSE, 2004.
MLA-čujuhus (9. p.)HELLER ROBERT. COMPLETE GUIDE TO MODERN MANAGEMENT. JAICO PUBLISHING HOUSE, 2004.
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