(2007). Secondary School Course Classification System: School Codes for the Exchange of Data. U.S. Department of Education.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিSecondary School Course Classification System: School Codes for the Exchange of Data. U.S. Department of Education, 2007.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিSecondary School Course Classification System: School Codes for the Exchange of Data. U.S. Department of Education, 2007.
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