http://e-repository.perpus.iainsalatiga.ac.id/19134
http://e-repository.perpus.iainsalatiga.ac.id/19296
http://e-repository.perpus.iainsalatiga.ac.id/19016
http://e-repository.perpus.iainsalatiga.ac.id/18139
http://e-repository.perpus.iainsalatiga.ac.id/18254