http://e-repository.perpus.iainsalatiga.ac.id/14687
http://e-repository.perpus.iainsalatiga.ac.id/14904
http://e-repository.perpus.iainsalatiga.ac.id/18001
http://e-repository.perpus.iainsalatiga.ac.id/17902
http://e-repository.perpus.iainsalatiga.ac.id/19323