?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.au=RAMADHAN%2C+LUTHFI+AKBAR&rft.aufirst=LUTHFI+AKBAR&rft.aulast=RAMADHAN&rft.title=ANALISIS+SENTIMEN+OPINI+MASYARAKAT+TERHADAP+KEEFEKTIFAN+PEMBELAJARAN+DARING+SELAMA+PANDEMI+COVID-19+MENGGUNAKAN+NA%C3%8FVE+BAYES+CLASSIFIER&rft.inst=Universitas+Muhammadiyah+Prof.+Dr.+HAMKA&rft.date=2021&rft.degree=Bachelor