(2007). Secondary School Course Classification System: School Codes for the Exchange of Data. U.S. Department of Education.
Chicago-Zitierstil (17. Ausg.)Secondary School Course Classification System: School Codes for the Exchange of Data. U.S. Department of Education, 2007.
MLA-Zitierstil (9. Ausg.)Secondary School Course Classification System: School Codes for the Exchange of Data. U.S. Department of Education, 2007.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.