http://e-repository.perpus.iainsalatiga.ac.id/18345
http://e-repository.perpus.iainsalatiga.ac.id/18760
http://e-repository.perpus.iainsalatiga.ac.id/18382
http://e-repository.perpus.iainsalatiga.ac.id/18767
http://e-repository.perpus.iainsalatiga.ac.id/19129