Style de citation APA (7e éd.)

Williams, D. K. (2013). The 7 non-negotiables of winning: Turn soft traits into hard results. John Wiley & Sons.

Style de citation Chicago (17e éd.)

Williams, David K. The 7 Non-negotiables of Winning: Turn Soft Traits into Hard Results. Hoboken, New Jersey: John Wiley & Sons, 2013.

Style de citation MLA (8e éd.)

Williams, David K. The 7 Non-negotiables of Winning: Turn Soft Traits into Hard Results. John Wiley & Sons, 2013.