Gaya APA
cole ,don. (2010).
ECONOMICS .
New York:
Society for research into Higher Education.
Gaya Chicago
cole ,don.
ECONOMICS.
New York:
Society for research into Higher Education,
2010.
Text.
Gaya MLA
cole ,don.
ECONOMICS.
New York:
Society for research into Higher Education,
2010.
Text.
Gaya Turabian
cole ,don.
ECONOMICS.
New York:
Society for research into Higher Education,
2010.
Print.