?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.btitle=PLAY+AND+THE+DEVELOPMENT+OF+THINKING+IN+CHILDREN&rft.tpages=12&rft.isbn=9789839479614&rft.date=1+January+2009&rft.genre=book