http://e-repository.perpus.iainsalatiga.ac.id/15889
http://e-repository.perpus.iainsalatiga.ac.id/15917
http://e-repository.perpus.iainsalatiga.ac.id/17731
http://e-repository.perpus.iainsalatiga.ac.id/17689
http://e-repository.perpus.iainsalatiga.ac.id/17571