author = { Halpenny, Ann Marie AND Pettersen, Jan },

title = { Introducing Piaget a guide for practitioners and students in early years education },

publisher = {Routledge},

isbn = {9780415525275},

isbn = {9780415525268},

year = {2014},

address = { London [u. a.] },

url = { http://slubdd.de/katalog?TN_libero_mab2 }