Gaya APA
Ferguson, John H. (1961).
The American federal government (6th.ed).
New York:
McGraw-Hill.
Gaya Chicago
Ferguson, John H.
The American federal government.
6th.ed
New York:
McGraw-Hill,
1961.
Text.
Gaya MLA
Ferguson, John H.
The American federal government.
6th.ed
New York:
McGraw-Hill,
1961.
Text.
Gaya Turabian
Ferguson, John H.
The American federal government.
6th.ed
New York:
McGraw-Hill,
1961.
Print.