@unpublished{repository13899,
       publisher = {UHAMKA},
            note = {Unpublished},
           title = {Turnitin Critical review on mathematics virtual classroom},
             url = {http://repository.uhamka.ac.id/id/eprint/13899/},
          author = {Maarif, Samsul and Umam, Khoerul and Soebagyo, Joko and Pradipta, Trisna Roy Pradipta}
}