@unpublished{UNY3237,
            year = {2011},
          school = {UNY},
           title = {PENGEMBANGAN DIKTAT PNEUMATIK KOMPETENSI KEAHLIAN TEKNIK PEMESINAN SMK PIRI 1 YOGYAKARTA},
          author = {- Iskandar},
             url = {http://eprints.uny.ac.id/3237/}
}