Gaya APA
Relationship Selling. (2008).
New York:
[s.n.].
Gaya Chicago
Relationship Selling.
.
New York:
[s.n.],
2008.
Text.
Gaya MLA
Relationship Selling.
.
New York:
[s.n.],
2008.
Text.
Gaya Turabian
Relationship Selling.
New York:
[s.n.],
2008.
Print.