Primary Schools Research and Development Group. (1973). Education 3-13: The professional journal for primary education. Longman Group.
Chicago-Zitierstil (17. Ausg.)Primary Schools Research and Development Group. Education 3-13: The Professional Journal for Primary Education. Essex, Inglaterra: Longman Group, 1973.
MLA-Zitierstil (8. Ausg.)Primary Schools Research and Development Group. Education 3-13: The Professional Journal for Primary Education. Longman Group, 1973.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.