http://e-repository.perpus.iainsalatiga.ac.id/15893
http://e-repository.perpus.iainsalatiga.ac.id/16489
http://e-repository.perpus.iainsalatiga.ac.id/16207
http://e-repository.perpus.iainsalatiga.ac.id/16273
http://e-repository.perpus.iainsalatiga.ac.id/14810