Value-added selling : how to sell more profitably, confidently, and professionally by competing on value not price / Tom Reilly. (2002). New York, NY: McGraw-Hill, c.
Value-added selling : how to sell more profitably, confidently, and professionally by competing on value not price / Tom Reilly. . New York, NY: McGraw-Hill, c, 2002. Buku Wajib.