Cole,Brent. How to win friends and influence people in the digital age. Simon & Schuster.
Čikaški stil citiranja (17. izdanje)Cole,Brent. How to Win Friends and Influence People in the Digital Age. Simon & Schuster.
MLA način citiranja (8. izdanje)Cole,Brent. How to Win Friends and Influence People in the Digital Age. Simon & Schuster.
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