(2007). Secondary School Course Classification System: School Codes for the Exchange of Data. U.S. Department of Education.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Secondary School Course Classification System: School Codes for the Exchange of Data. U.S. Department of Education, 2007.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Secondary School Course Classification System: School Codes for the Exchange of Data. U.S. Department of Education, 2007.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.