(2006). United States High School Sophomores: A Twenty-Two Year Comparison, 1980-2002. U.S. Department of Education.
Citazione stile Chigago Style (17a edizione)United States High School Sophomores: A Twenty-Two Year Comparison, 1980-2002. U.S. Department of Education, 2006.
Citatione MLA (9a ed.)United States High School Sophomores: A Twenty-Two Year Comparison, 1980-2002. U.S. Department of Education, 2006.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.