Willekens, H. (2015). The development of early childhood education in Europe and North America: Historical and comparative perspectives (1. publ.). Palgrave Macmillan.
Chicago-Zitierstil (17. Ausg.)Willekens, Harry. The Development of Early Childhood Education in Europe and North America: Historical and Comparative Perspectives. 1. publ. Basingstoke, Hampshire [u.a.]: Palgrave Macmillan, 2015.
MLA-Zitierstil (9. Ausg.)Willekens, Harry. The Development of Early Childhood Education in Europe and North America: Historical and Comparative Perspectives. 1. publ. Palgrave Macmillan, 2015.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.