Primary Schools Research and Development Group. (1973). Education 3-13: The professional journal for primary education. Longman Group.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিPrimary Schools Research and Development Group. Education 3-13: The Professional Journal for Primary Education. Essex, Inglaterra: Longman Group, 1973.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিPrimary Schools Research and Development Group. Education 3-13: The Professional Journal for Primary Education. Longman Group, 1973.
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