http://e-repository.perpus.iainsalatiga.ac.id/15929
http://e-repository.perpus.iainsalatiga.ac.id/15905
http://e-repository.perpus.iainsalatiga.ac.id/16335
http://e-repository.perpus.iainsalatiga.ac.id/11577
http://e-repository.perpus.iainsalatiga.ac.id/16288