Gaya APA
Williams, D, K. (2013).
The 7 Non - Negotiables Of Winning : Tying Soft Traits to Hard Results (Edisi 1).
USA:
Wiley Interscience.
Gaya MLA
Williams, David, K..
"The 7 Non - Negotiables Of Winning : Tying Soft Traits to Hard Results".
Edisi 1
USA:
Wiley Interscience,
2013.
TEXT.