Gaya APA
The American Political System. (2014).
New York:
WW Norton Company, Inc.
Gaya Chicago
The American Political System.
Ed.2.
New York:
WW Norton Company, Inc,
2014.
.
Gaya MLA
The American Political System.
Ed.2.
New York:
WW Norton Company, Inc,
2014.
.
Gaya Turabian
The American Political System.
New York:
WW Norton Company, Inc,
2014.
.