http://repository.uhamka.ac.id/id/eprint/12576/ Hasil Simliraty Turnitin Artikel "Critical review on mathematics virtual classroom practice in private university" Samsul Maarif, SMF http://repository.uhamka.ac.id/id/eprint/12576/1/Critical%20review%20on%20mathematics%20virtual%20classroom%20practice%20in%20private%20university.pdf Unduh!