http://e-repository.perpus.iainsalatiga.ac.id/17663
http://e-repository.perpus.iainsalatiga.ac.id/17385
http://e-repository.perpus.iainsalatiga.ac.id/17734
http://e-repository.perpus.iainsalatiga.ac.id/18752
http://e-repository.perpus.iainsalatiga.ac.id/17845