http://e-repository.perpus.iainsalatiga.ac.id/19254
http://e-repository.perpus.iainsalatiga.ac.id/19601
http://e-repository.perpus.iainsalatiga.ac.id/19629
http://e-repository.perpus.iainsalatiga.ac.id/20050
http://e-repository.perpus.iainsalatiga.ac.id/19822