?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.au=Moh+Ali+Ridwan%2C+NIM.+16650031&rft.aulast=Moh+Ali+Ridwan&rft.aufirst=NIM.+16650031&rft.degree=Skripsi&rft.date=27+January+2021&rft.title=EVALUASI+USABILITY+SISTEM+E-LEARNING+SMA+MUHAMMADIYAH+4+YOGYAKARTA&rft.inst=UIN+SUNAN+KALIJAGA+YOGYAKARTA&rft.tpages=65