HARVARD BUSINESS REVIEW. (1973). HOW TO IMPROVE SALES MANAGEMENT. HARVARD BUS. SCHOOL.
Čikaški stil citiranja (17. izdanje)HARVARD BUSINESS REVIEW. HOW TO IMPROVE SALES MANAGEMENT. USA: HARVARD BUS. SCHOOL, 1973.
MLA način citiranja (9. izdanje)HARVARD BUSINESS REVIEW. HOW TO IMPROVE SALES MANAGEMENT. HARVARD BUS. SCHOOL, 1973.
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