https://etd.repository.ugm.ac.id/penelitian/detail/677292014never1.0https://etd.repository.ugm.ac.id/penelitian/detail/698692014never1.0https://etd.repository.ugm.ac.id/penelitian/detail/699042014never1.0https://etd.repository.ugm.ac.id/penelitian/detail/701512014never1.0https://etd.repository.ugm.ac.id/penelitian/detail/724412014never1.0https://etd.repository.ugm.ac.id/penelitian/detail/724932014never1.0https://etd.repository.ugm.ac.id/penelitian/detail/725442014never1.0https://etd.repository.ugm.ac.id/penelitian/detail/725822014never1.0https://etd.repository.ugm.ac.id/penelitian/detail/727102014never1.0https://etd.repository.ugm.ac.id/penelitian/detail/754232014never1.0https://etd.repository.ugm.ac.id/penelitian/detail/755452014never1.0https://etd.repository.ugm.ac.id/penelitian/detail/765832014never1.0https://etd.repository.ugm.ac.id/penelitian/detail/766092014never1.0