APA

United States, .Statistical abstract of the United States. Washington, D.C: U.S. Dept. of Commerce, Econimics and Statistics Administration, Bureau of the Census.

Chicago

United States, .Statistical abstract of the United States. Washington, D.C: U.S. Dept. of Commerce, Econimics and Statistics Administration, Bureau of the Census.

Harvard

United States, .Statistical abstract of the United States. Washington, D.C: U.S. Dept. of Commerce, Econimics and Statistics Administration, Bureau of the Census.

MLA

United States, .Washington, D.C: U.S. Dept. of Commerce, Econimics and Statistics Administration, Bureau of the Census. .