http://e-repository.perpus.iainsalatiga.ac.id/15656
http://e-repository.perpus.iainsalatiga.ac.id/17215
http://e-repository.perpus.iainsalatiga.ac.id/12129
http://e-repository.perpus.iainsalatiga.ac.id/17292
http://e-repository.perpus.iainsalatiga.ac.id/17410