Harvard Business Review. (2009). The HBR list: Breakthrough ideas for 2009. Harvard Business.
Čikaški stil citiranjaHarvard Business Review. The HBR List: Breakthrough Ideas for 2009. Boston: Harvard Business, 2009.
MLA način citiranjaHarvard Business Review. The HBR List: Breakthrough Ideas for 2009. Harvard Business, 2009.
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