https://etd.repository.ugm.ac.id/penelitian/detail/2242652023never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2243822023never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2244042023never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2244102023never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2247782023never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2291472023never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2291482023never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2297632023never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2298922023never1.0