http://e-repository.perpus.iainsalatiga.ac.id/8252
http://e-repository.perpus.iainsalatiga.ac.id/8589
http://e-repository.perpus.iainsalatiga.ac.id/8234
http://e-repository.perpus.iainsalatiga.ac.id/8223
http://e-repository.perpus.iainsalatiga.ac.id/8121/