Gaya APA
Willingham, Ron. (2006).
The Inner Game of Selling: Mastering the Hidden Forces That Determine Your Success .
New York:
The Free Press.
Gaya Chicago
Willingham, Ron.
The Inner Game of Selling: Mastering the Hidden Forces That Determine Your Success.
New York:
The Free Press,
2006.
Buku.
Gaya MLA
Willingham, Ron.
The Inner Game of Selling: Mastering the Hidden Forces That Determine Your Success.
New York:
The Free Press,
2006.
Buku.
Gaya Turabian
Willingham, Ron.
The Inner Game of Selling: Mastering the Hidden Forces That Determine Your Success.
New York:
The Free Press,
2006.
Buku.