Gaya APA
Marketing Research Essentials. (2004).
[s.l.]:
[s.n.].
Gaya Chicago
Marketing Research Essentials.
.
[s.l.]:
[s.n.],
2004.
Text.
Gaya MLA
Marketing Research Essentials.
.
[s.l.]:
[s.n.],
2004.
Text.
Gaya Turabian
Marketing Research Essentials.
[s.l.]:
[s.n.],
2004.
Print.