https://etd.repository.ugm.ac.id/penelitian/detail/2245932023never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2295172023never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2295282023never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2298832023never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2299662023never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2300282023never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2301732023never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2301742023never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2302722023never1.0