?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Nurul%2C+Akbar&rft.aulast=Nurul&rft.aufirst=Akbar&rft.date=1996&rft.title=Medical+Journal+of+Indonesia&rft.atitle=Risk+of+Anti-Hepatitis+A+Virus+in+an+Urban+Population+in+Jakarta&rft.volume=5&rft.issue=4&rft.genre=article