http://e-repository.perpus.iainsalatiga.ac.id/12904
http://e-repository.perpus.iainsalatiga.ac.id/12181
http://e-repository.perpus.iainsalatiga.ac.id/11968
http://e-repository.perpus.iainsalatiga.ac.id/11877
http://e-repository.perpus.iainsalatiga.ac.id/9667