(2006). Dropout Rates in the United States: 2004. U.S. Department of Education.
Chicago-referens (17:e uppl.)Dropout Rates in the United States: 2004. U.S. Department of Education, 2006.
MLA-referens (9:e uppl.)Dropout Rates in the United States: 2004. U.S. Department of Education, 2006.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.