APA

Karr A. R., Clack G., . (2004). Outline of the U.S. Economy. Washington: Office of International Information Programs U. S. Department of State.

Chicago

Karr A R, Clack G, . 2004. Outline of the U.S. Economy. Washington: Office of International Information Programs U. S. Department of State.

Harvard

Karr A. R., Clack G., . (2004). Outline of the U.S. Economy. Washington: Office of International Information Programs U. S. Department of State.

MLA

Karr A R, Clack G, . Outline of the U.S. Economy. Washington: Office of International Information Programs U. S. Department of State. 2004.