Gaya APA
American Government. (2013).
New York:
[s.n.].
Gaya Chicago
American Government.
1.
New York:
[s.n.],
2013.
Text.
Gaya MLA
American Government.
1.
New York:
[s.n.],
2013.
Text.
Gaya Turabian
American Government.
New York:
[s.n.],
2013.
Print.