http://e-repository.perpus.iainsalatiga.ac.id/16292
http://e-repository.perpus.iainsalatiga.ac.id/16211
http://e-repository.perpus.iainsalatiga.ac.id/16155
http://e-repository.perpus.iainsalatiga.ac.id/15715
http://e-repository.perpus.iainsalatiga.ac.id/13200