RIGGS JAMES L. (1983). PRODUCTIVITY BY OBJECTIVES. PRENTICE -HALL INTERNATIONAL, INC.
Chicago-čujuhus (17. p.)RIGGS JAMES L. PRODUCTIVITY BY OBJECTIVES. NEW JERSE: PRENTICE -HALL INTERNATIONAL, INC, 1983.
MLA-čujuhus (9. p.)RIGGS JAMES L. PRODUCTIVITY BY OBJECTIVES. PRENTICE -HALL INTERNATIONAL, INC, 1983.
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