http://e-repository.perpus.iainsalatiga.ac.id/14502
http://e-repository.perpus.iainsalatiga.ac.id/11765
http://e-repository.perpus.iainsalatiga.ac.id/11661
http://e-repository.perpus.iainsalatiga.ac.id/11637
http://e-repository.perpus.iainsalatiga.ac.id/11569