?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Schoon&rft.aufirst=I&rft.au=Schoon%2C+I&rft.date=April+2011&rft.issn=1470-2738&rft.volume=Online&rft.atitle=Family+hardship%2C+family+instability%2C+and+children's+cognitive+development&rft.title=Journal+of+Epidemiology+and+Community+Health&rft.pages=1-7&rft.genre=article