APA

United States, . (2000). The older population i9n the United States. Washington, DC: U.S. Dept. of Commerce, Economics and Statistics Administration U.S. Census Bureau.

Chicago

United States, . 2000. The older population i9n the United States. Washington, DC: U.S. Dept. of Commerce, Economics and Statistics Administration U.S. Census Bureau.

Harvard

United States, . (2000). The older population i9n the United States. Washington, DC: U.S. Dept. of Commerce, Economics and Statistics Administration U.S. Census Bureau.

MLA

United States, . The older population i9n the United States. Washington, DC: U.S. Dept. of Commerce, Economics and Statistics Administration U.S. Census Bureau. 2000.