http://e-repository.perpus.iainsalatiga.ac.id/15998
http://e-repository.perpus.iainsalatiga.ac.id/13358
http://e-repository.perpus.iainsalatiga.ac.id/18370
http://e-repository.perpus.iainsalatiga.ac.id/18724
http://e-repository.perpus.iainsalatiga.ac.id/9416