@unpublished{repository42116,
           title = {Sertifikat Participant Workshop Internasional "Achieving Publication in Reputable Journals},
            note = {Unpublished},
       publisher = {Universitas Muhammadiyah Prof Dr Hamka},
          author = {Ima Mulyawati, IM},
             url = {http://repository.uhamka.ac.id/id/eprint/42116/}
}