http://e-repository.perpus.iainsalatiga.ac.id/15021
http://e-repository.perpus.iainsalatiga.ac.id/15440
http://e-repository.perpus.iainsalatiga.ac.id/15196
http://e-repository.perpus.iainsalatiga.ac.id/13664
http://e-repository.perpus.iainsalatiga.ac.id/13854