http://e-repository.perpus.iainsalatiga.ac.id/18968
http://e-repository.perpus.iainsalatiga.ac.id/19436
http://e-repository.perpus.iainsalatiga.ac.id/19486
http://e-repository.perpus.iainsalatiga.ac.id/17916
http://e-repository.perpus.iainsalatiga.ac.id/19692