BALL ROBERT. (1984). MANAGEMENT TECHNIQUES AND QUANTITATIVE METHOD. HEINEMANN.
Čikaški stil citiranja (17. izdanje)BALL ROBERT. MANAGEMENT TECHNIQUES AND QUANTITATIVE METHOD. LONDON: HEINEMANN, 1984.
MLA način citiranja (9. izdanje)BALL ROBERT. MANAGEMENT TECHNIQUES AND QUANTITATIVE METHOD. HEINEMANN, 1984.
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