APA

United States, . (2001). Earnings and employment data for workers covered under social security and Medicare, by state and country (Online). Baltimore, Md: Social Security Administration, Office of Policy, Office of Research, Evaluation, and Statistics.

Chicago

United States, . 2001. Earnings and employment data for workers covered under social security and Medicare, by state and country (Online). Baltimore, Md: Social Security Administration, Office of Policy, Office of Research, Evaluation, and Statistics.

Harvard

United States, . (2001). Earnings and employment data for workers covered under social security and Medicare, by state and country (Online). Baltimore, Md: Social Security Administration, Office of Policy, Office of Research, Evaluation, and Statistics.

MLA

United States, . Earnings and employment data for workers covered under social security and Medicare, by state and country (Online). Baltimore, Md: Social Security Administration, Office of Policy, Office of Research, Evaluation, and Statistics. 2001.