Citing Census Data
Here is an example of how to cite census data in APA format:
U.S. Census Bureau. 2000. "Census 2000 Summary File 3 (SF3) - Sample Data, Table P19 Age by Language Spoken at Home by Ability to Speak English for the Population 5 Years and Over". Retrieved 25 September 2002 from U.S. Census http://factfinder.census.gov.
In text Citation: (U.S. Census Bureau, 2000)