http://e-repository.perpus.iainsalatiga.ac.id/19629
http://e-repository.perpus.iainsalatiga.ac.id/19943
http://e-repository.perpus.iainsalatiga.ac.id/18172
http://e-repository.perpus.iainsalatiga.ac.id/18647
http://e-repository.perpus.iainsalatiga.ac.id/18441