Gaya APA
Silverman, George. (2011).
The secrets of word - of - mouth marketing (2nd ed).
New York:
Amacom.
Gaya Chicago
Silverman, George.
The secrets of word - of - mouth marketing.
2nd ed
New York:
Amacom,
2011.
Text.
Gaya MLA
Silverman, George.
The secrets of word - of - mouth marketing.
2nd ed
New York:
Amacom,
2011.
Text.
Gaya Turabian
Silverman, George.
The secrets of word - of - mouth marketing.
2nd ed
New York:
Amacom,
2011.
Print.