http://e-repository.perpus.iainsalatiga.ac.id/19169
http://e-repository.perpus.iainsalatiga.ac.id/19166
http://e-repository.perpus.iainsalatiga.ac.id/19082
http://e-repository.perpus.iainsalatiga.ac.id/17987
http://e-repository.perpus.iainsalatiga.ac.id/19193