http://e-repository.perpus.iainsalatiga.ac.id/18072
http://e-repository.perpus.iainsalatiga.ac.id/19747
http://e-repository.perpus.iainsalatiga.ac.id/19903
http://e-repository.perpus.iainsalatiga.ac.id/20063
http://e-repository.perpus.iainsalatiga.ac.id/19792