http://e-repository.perpus.iainsalatiga.ac.id/19260
http://e-repository.perpus.iainsalatiga.ac.id/17653
http://e-repository.perpus.iainsalatiga.ac.id/17335
http://e-repository.perpus.iainsalatiga.ac.id/17635
http://e-repository.perpus.iainsalatiga.ac.id/17431