http://e-repository.perpus.iainsalatiga.ac.id/17379
http://e-repository.perpus.iainsalatiga.ac.id/17391
http://e-repository.perpus.iainsalatiga.ac.id/14255
http://e-repository.perpus.iainsalatiga.ac.id/12255
http://e-repository.perpus.iainsalatiga.ac.id/15917