http://e-repository.perpus.iainsalatiga.ac.id/7835
http://e-repository.perpus.iainsalatiga.ac.id/7862/
http://e-repository.perpus.iainsalatiga.ac.id/8657
http://e-repository.perpus.iainsalatiga.ac.id/8904
http://e-repository.perpus.iainsalatiga.ac.id/8937