(2000). Percentage of Students by Reading Achievement Level & Grade. U.S. Department of Education.
Chicago-viite (17. p.)Percentage of Students by Reading Achievement Level & Grade. U.S. Department of Education, 2000.
MLA-viite (9. p.)Percentage of Students by Reading Achievement Level & Grade. U.S. Department of Education, 2000.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.