http://e-repository.perpus.iainsalatiga.ac.id/18072
http://e-repository.perpus.iainsalatiga.ac.id/19854
http://e-repository.perpus.iainsalatiga.ac.id/19504
http://e-repository.perpus.iainsalatiga.ac.id/19623
http://e-repository.perpus.iainsalatiga.ac.id/20065