http://e-repository.perpus.iainsalatiga.ac.id/15889
http://e-repository.perpus.iainsalatiga.ac.id/15917
http://e-repository.perpus.iainsalatiga.ac.id/12255
http://e-repository.perpus.iainsalatiga.ac.id/16508
http://e-repository.perpus.iainsalatiga.ac.id/14255