http://e-repository.perpus.iainsalatiga.ac.id/18868
http://e-repository.perpus.iainsalatiga.ac.id/19133
http://e-repository.perpus.iainsalatiga.ac.id/19056
http://e-repository.perpus.iainsalatiga.ac.id/19196
http://e-repository.perpus.iainsalatiga.ac.id/18909