https://etd.repository.ugm.ac.id/penelitian/detail/779792015never1.0https://etd.repository.ugm.ac.id/penelitian/detail/787392015never1.0https://etd.repository.ugm.ac.id/penelitian/detail/803782015never1.0https://etd.repository.ugm.ac.id/penelitian/detail/803802015never1.0https://etd.repository.ugm.ac.id/penelitian/detail/804302015never1.0https://etd.repository.ugm.ac.id/penelitian/detail/811762015never1.0https://etd.repository.ugm.ac.id/penelitian/detail/812592015never1.0https://etd.repository.ugm.ac.id/penelitian/detail/814082015never1.0https://etd.repository.ugm.ac.id/penelitian/detail/815842015never1.0https://etd.repository.ugm.ac.id/penelitian/detail/816552015never1.0https://etd.repository.ugm.ac.id/penelitian/detail/888822015never1.0https://etd.repository.ugm.ac.id/penelitian/detail/925632015never1.0