http://e-repository.perpus.iainsalatiga.ac.id/12273
http://e-repository.perpus.iainsalatiga.ac.id/12198
http://e-repository.perpus.iainsalatiga.ac.id/11872
http://e-repository.perpus.iainsalatiga.ac.id/11270
http://e-repository.perpus.iainsalatiga.ac.id/11999