?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=Aulia&rft.aulast=Rahman&rft.au=Rahman%2C+Aulia&rft.atitle=Catalytic+Activity+of+Reused+SiO%E2%82%82%E2%80%93TiO%E2%82%82+on+Biodiesel+Production+from+Waste+Cooking+Oil+in+Various+Catalyst+Loading&rft.date=August+2019&rft.issn=Print%3A+2454-2237+dan+Online%3A+2349-9788&rft.title=International+Journal+of+Research+and+Review&rft.volume=6&rft.issue=8&rft.pages=86-93&rft.genre=article