http://e-repository.perpus.iainsalatiga.ac.id/19296
http://e-repository.perpus.iainsalatiga.ac.id/18215
http://e-repository.perpus.iainsalatiga.ac.id/18604
http://e-repository.perpus.iainsalatiga.ac.id/18939
http://e-repository.perpus.iainsalatiga.ac.id/18492