https://etd.repository.ugm.ac.id/penelitian/detail/1578052018never1.0https://etd.repository.ugm.ac.id/penelitian/detail/1579572018never1.0https://etd.repository.ugm.ac.id/penelitian/detail/1579962018never1.0https://etd.repository.ugm.ac.id/penelitian/detail/1640392018never1.0https://etd.repository.ugm.ac.id/penelitian/detail/1642142018never1.0https://etd.repository.ugm.ac.id/penelitian/detail/1642442018never1.0https://etd.repository.ugm.ac.id/penelitian/detail/1658162018never1.0https://etd.repository.ugm.ac.id/penelitian/detail/1665012018never1.0https://etd.repository.ugm.ac.id/penelitian/detail/1668332018never1.0https://etd.repository.ugm.ac.id/penelitian/detail/1669352018never1.0https://etd.repository.ugm.ac.id/penelitian/detail/1669422018never1.0https://etd.repository.ugm.ac.id/penelitian/detail/1670542018never1.0https://etd.repository.ugm.ac.id/penelitian/detail/1741842018never1.0