(2006). United States High School Sophomores: A Twenty-Two Year Comparison, 1980-2002. U.S. Department of Education.
Chicago-čujuhus (17. p.)United States High School Sophomores: A Twenty-Two Year Comparison, 1980-2002. U.S. Department of Education, 2006.
MLA-čujuhus (9. p.)United States High School Sophomores: A Twenty-Two Year Comparison, 1980-2002. U.S. Department of Education, 2006.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.