@unpublished{UNY5417,
           title = {PENGEMBANGAN MODUL DASAR SISTEM HIDROLIK DI SMK NEGERI 3 YOGYAKARTA},
          author = {Ari Supriyo},
          school = {Universitas Negeri Yogyakarta},
            year = {2010},
             url = {http://eprints.uny.ac.id/5417/}
}