FORTUNE JOYCE. (1997). LEARNING FROM FAILURE: SYSTEMS APPROACH. JOHN WILEY AND SONS.
Chicago-čujuhus (17. p.)FORTUNE JOYCE. LEARNING FROM FAILURE: SYSTEMS APPROACH. NEW JERSEY,USA: JOHN WILEY AND SONS, 1997.
MLA-čujuhus (9. p.)FORTUNE JOYCE. LEARNING FROM FAILURE: SYSTEMS APPROACH. JOHN WILEY AND SONS, 1997.
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