http://e-repository.perpus.iainsalatiga.ac.id/18467
http://e-repository.perpus.iainsalatiga.ac.id/19145
http://e-repository.perpus.iainsalatiga.ac.id/19103
http://e-repository.perpus.iainsalatiga.ac.id/19039
http://e-repository.perpus.iainsalatiga.ac.id/18987