http://e-repository.perpus.iainsalatiga.ac.id/18258
http://e-repository.perpus.iainsalatiga.ac.id/18056
http://e-repository.perpus.iainsalatiga.ac.id/19106
http://e-repository.perpus.iainsalatiga.ac.id/19459
http://e-repository.perpus.iainsalatiga.ac.id/19446