http://e-repository.perpus.iainsalatiga.ac.id/13306
http://e-repository.perpus.iainsalatiga.ac.id/13523
http://e-repository.perpus.iainsalatiga.ac.id/13245
http://e-repository.perpus.iainsalatiga.ac.id/10813
http://e-repository.perpus.iainsalatiga.ac.id/20111