http://e-repository.perpus.iainsalatiga.ac.id/10290/
http://e-repository.perpus.iainsalatiga.ac.id/10293
http://e-repository.perpus.iainsalatiga.ac.id/10587
http://e-repository.perpus.iainsalatiga.ac.id/10554
http://e-repository.perpus.iainsalatiga.ac.id/11663
http://e-repository.perpus.iainsalatiga.ac.id/10515