Basic Format for APA 7th edition
U.S. Census Bureau (year data was published). Name of data or report. Retrieved from [URL].
Chicago Style 16th ed.
United States Census Bureau. Name of Table. Data.Census.Gov <URL> (The date the Table was generated)
The Bluebook: a Uniform System of Citation is the most commonly used citation system for legal research. Other styles like APA and Chicago may direct users to follow Bluebook style. See Cornell's Introduction to Basic Legal Citation for more information.