http://e-repository.perpus.iainsalatiga.ac.id/11251
http://e-repository.perpus.iainsalatiga.ac.id/10740
http://e-repository.perpus.iainsalatiga.ac.id/10778
http://e-repository.perpus.iainsalatiga.ac.id/11517
http://e-repository.perpus.iainsalatiga.ac.id/11877