Douglas, F. (1994). The history of the Irish Pre-School Playgroups Association. Irish Pre-School Playgroups Association.
Chicago-Zitierstil (17. Ausg.)Douglas, Francis. The History of the Irish Pre-School Playgroups Association. Dublin: Irish Pre-School Playgroups Association, 1994.
MLA-Zitierstil (9. Ausg.)Douglas, Francis. The History of the Irish Pre-School Playgroups Association. Irish Pre-School Playgroups Association, 1994.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.