(2000). National Indicators of Public Investment in Education. U.S. Department of Education.
Cita Chicago (17th ed.)National Indicators of Public Investment in Education. U.S. Department of Education, 2000.
Cita MLA (9th ed.)National Indicators of Public Investment in Education. U.S. Department of Education, 2000.
Atenció: Aquestes cites poden no estar 100% correctes.