http://e-repository.perpus.iainsalatiga.ac.id/17520
http://e-repository.perpus.iainsalatiga.ac.id/17143
http://e-repository.perpus.iainsalatiga.ac.id/17477
http://e-repository.perpus.iainsalatiga.ac.id/18267
http://e-repository.perpus.iainsalatiga.ac.id/19200