di k2
http://e-repository.perpus.iainsalatiga.ac.id/13285
http://e-repository.perpus.iainsalatiga.ac.id/13069
http://e-repository.perpus.iainsalatiga.ac.id/14354
http://e-repository.perpus.iainsalatiga.ac.id/14332
http://e-repository.perpus.iainsalatiga.ac.id/14439