Primary Schools Research and Development Group. (1973). Education 3-13: The professional journal for primary education. Longman Group.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Primary Schools Research and Development Group. Education 3-13: The Professional Journal for Primary Education. Essex, Inglaterra: Longman Group, 1973.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Primary Schools Research and Development Group. Education 3-13: The Professional Journal for Primary Education. Longman Group, 1973.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.