@unpublished{repository22935,
           title = {Ebook Strategi Digital MArketing},
            note = {Unpublished},
       publisher = {Universitas Muhammadiyah Prof.Dr.Hamka},
          author = {Widayanti, Ari},
             url = {http://repository.uhamka.ac.id/id/eprint/22935/}
}