http://e-repository.perpus.iainsalatiga.ac.id/18323
http://e-repository.perpus.iainsalatiga.ac.id/18163
http://e-repository.perpus.iainsalatiga.ac.id/18647
http://e-repository.perpus.iainsalatiga.ac.id/18493
http://e-repository.perpus.iainsalatiga.ac.id/19420