?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Pratiwi&rft.aufirst=Niniek+L.&rft.au=Pratiwi%2C+Niniek+L.&rft.date=2002&rft.atitle=Analisis+Kecenderungan+Gingivitis+pada+Perokok&rft.genre=article