@phdthesis{UNY7553,
          author = {Prasetiyo Erwan Eko },
           title = {MEDIA PEMBELAJARAN FILTER SINYAL AUDIO UNTUK MATA PELAJARAN TEKNIK AUDIO
},
           month = {November},
            year = {2012},
          school = {UNY},
             url = {http://eprints.uny.ac.id/7553/}
}