Hasugian, Jonner and Dirmansyah, Dirmansyah  (2019) Trends in the Use of Information Resources at the Universitas Sumatera Utara Library.   In:  PROCEEDINGS Adab-International Conference on Information and Cultural Sciences “Cultural Literacy and Islam in the Post-Truth Society”.   UIN SUNAN KALIJAGA, Yogyakarta.  ISBN 27150550