Gaya APA

Williams, D, K. (2013). The 7 Non-Negotiables of Winning: Tying Soft Traits to Hard Results . Amerika Serikat: Wiley.

Gaya MLA

Williams, David, K.. "The 7 Non-Negotiables of Winning: Tying Soft Traits to Hard Results". Amerika Serikat: Wiley, 2013. Text.