Williams, D. K. (2013). The 7 non-negotiables of winning: Tying soft traits to hard results. Hoboken: Wiley.
Čikaški stil citiranjaWilliams, David K. The 7 Non-negotiables of Winning: Tying Soft Traits to Hard Results. Hoboken: Wiley, 2013.
MLA način citiranjaWilliams, David K. The 7 Non-negotiables of Winning: Tying Soft Traits to Hard Results. Hoboken: Wiley, 2013.
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