Gaya APA
Clack, George. (1981).
Outline of the U.S. Economy .
U.S.A:
U.S. Department of State.
Gaya Chicago
Clack, George.
Outline of the U.S. Economy.
U.S.A:
U.S. Department of State,
1981.
Text.
Gaya MLA
Clack, George.
Outline of the U.S. Economy.
U.S.A:
U.S. Department of State,
1981.
Text.
Gaya Turabian
Clack, George.
Outline of the U.S. Economy.
U.S.A:
U.S. Department of State,
1981.
Print.