Gaya APA
Ferguson, John H. (1959).
The American system of government (5th ed.).
New York:
McGraw-Hill.
Gaya Chicago
Ferguson, John H.
The American system of government.
5th ed.
New York:
McGraw-Hill,
1959.
Text.
Gaya MLA
Ferguson, John H.
The American system of government.
5th ed.
New York:
McGraw-Hill,
1959.
Text.
Gaya Turabian
Ferguson, John H.
The American system of government.
5th ed.
New York:
McGraw-Hill,
1959.
Print.