?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Ardan&rft.au=Ardan%2C+Syafira&rft.aufirst=Syafira&rft.pages=133-141&rft.atitle=The+Study+of+Reused+Silica-Titania+Catalyst+on+Biodiesel+Production+in+Various+Reaction+Times&rft.date=August+2019&rft.issue=8&rft.issn=Online%3A+2454-8006&rft.title=International+Journal+of+Advances+in+Scientific+Research+and+Engineering+(IJASRE)&rft.volume=5&rft.genre=article