http://e-repository.perpus.iainsalatiga.ac.id/16110
http://e-repository.perpus.iainsalatiga.ac.id/17716
http://e-repository.perpus.iainsalatiga.ac.id/17783
http://e-repository.perpus.iainsalatiga.ac.id/17819
http://e-repository.perpus.iainsalatiga.ac.id/17778