http://e-repository.perpus.iainsalatiga.ac.id/9496
http://e-repository.perpus.iainsalatiga.ac.id/9499
http://e-repository.perpus.iainsalatiga.ac.id/9556
http://e-repository.perpus.iainsalatiga.ac.id/9186
http://e-repository.perpus.iainsalatiga.ac.id/8176