and Benefits of Federal Regulations. Office of Management and Budget. September 30, 1997 [2015-07-10]. (原始内容存档于2015-09-12). The Federal Register Tutorial
Budget. [2008-05-05]. (原始内容存档于2009-03-15). Grieco, Elizabeth M; Rachel C. Cassidy. Overview of Race and Hispanic Origin: 2000 (PDF). UnitedStates Census
2000 (PDF). UnitedStates Census Bureau. [2008-04-24]. (原始内容 (PDF)存档于2020-06-10). Revisions to the Standards for the Classification of Federal Data on Race