BALL ROBERT. (1984). MANAGEMENT TECHNIQUES AND QUANTITATIVE METHOD. HEINEMANN.
Chicago-čujuhus (17. p.)BALL ROBERT. MANAGEMENT TECHNIQUES AND QUANTITATIVE METHOD. LONDON: HEINEMANN, 1984.
MLA-čujuhus (9. p.)BALL ROBERT. MANAGEMENT TECHNIQUES AND QUANTITATIVE METHOD. HEINEMANN, 1984.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.