http://e-repository.perpus.iainsalatiga.ac.id/10208
http://e-repository.perpus.iainsalatiga.ac.id/10634
http://e-repository.perpus.iainsalatiga.ac.id/10298
http://e-repository.perpus.iainsalatiga.ac.id/12190
http://e-repository.perpus.iainsalatiga.ac.id/9252