(2000). Elementary & Secondary School Enrollment: Fall 1970-2008. U.S. Department of Education.
Chicago (17e ed.) BronvermeldingElementary & Secondary School Enrollment: Fall 1970-2008. U.S. Department of Education, 2000.
MLA (9e ed.) BronvermeldingElementary & Secondary School Enrollment: Fall 1970-2008. U.S. Department of Education, 2000.
Let op: Deze citaties zijn niet altijd 100% accuraat.