Smith, F. C. (1961). Workbook in basic statistics for business economics (2nd. ed.). Dubuque, IA: Brown.
Παραπομπή Chicago StyleSmith, Frank C. Workbook in Basic Statistics for Business Economics. 2nd. ed. Dubuque, IA: Brown, 1961.
Παραπομπή MLASmith, Frank C. Workbook in Basic Statistics for Business Economics. 2nd. ed. Dubuque, IA: Brown, 1961.
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