http://e-repository.perpus.iainsalatiga.ac.id/18898
http://e-repository.perpus.iainsalatiga.ac.id/18873
http://e-repository.perpus.iainsalatiga.ac.id/18356
http://e-repository.perpus.iainsalatiga.ac.id/18461
http://e-repository.perpus.iainsalatiga.ac.id/18904