@unpublished{UNY2368,
          school = {UNY},
            year = {2011},
          author = {Agriska Prenadita Putri},
           title = {PENGGUNAAN METODE RIDGE TRACE DAN VARIANCE INFLATION FACTORS (VIF) PADA REGRESI RIDGE},
             url = {http://eprints.uny.ac.id/2368/}
}