HEYEL CARL EDT. (1963). ENCYCLOPEDIA OF MANAGEMENT. VAN NASTRRED REINHOLD.
Chicago-čujuhus (17. p.)HEYEL CARL EDT. ENCYCLOPEDIA OF MANAGEMENT. LONDON: VAN NASTRRED REINHOLD, 1963.
MLA-čujuhus (9. p.)HEYEL CARL EDT. ENCYCLOPEDIA OF MANAGEMENT. VAN NASTRRED REINHOLD, 1963.
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