http://e-repository.perpus.iainsalatiga.ac.id/19515
http://e-repository.perpus.iainsalatiga.ac.id/19836
http://e-repository.perpus.iainsalatiga.ac.id/20067
http://e-repository.perpus.iainsalatiga.ac.id/19792
http://e-repository.perpus.iainsalatiga.ac.id/20298