http://e-repository.perpus.iainsalatiga.ac.id/18741
http://e-repository.perpus.iainsalatiga.ac.id/18181
http://e-repository.perpus.iainsalatiga.ac.id/19734
http://e-repository.perpus.iainsalatiga.ac.id/20005
http://e-repository.perpus.iainsalatiga.ac.id/19185