http://e-repository.perpus.iainsalatiga.ac.id/18833
http://e-repository.perpus.iainsalatiga.ac.id/18158
http://e-repository.perpus.iainsalatiga.ac.id/18674
http://e-repository.perpus.iainsalatiga.ac.id/18163
http://e-repository.perpus.iainsalatiga.ac.id/19497