?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Helmina%2C+Salma+Nur&rft.aufirst=Salma+Nur&rft.aulast=Helmina&rft.volume=49&rft.title=Buletin+Penelitian+Kesehatan&rft.issue=2&rft.atitle=Pengetahuan+dan+Motivasi+Kepatuhan+Protokol+Kesehatan+Covid-19+%3A+Survei+Online+pada+Mahasiswa+Jawa+Timur&rft.pages=71-80&rft.issn=2338-3453&rft.date=June+2021&rft.genre=article