http://e-repository.perpus.iainsalatiga.ac.id/20111
http://e-repository.perpus.iainsalatiga.ac.id/20077
http://e-repository.perpus.iainsalatiga.ac.id/17251
http://e-repository.perpus.iainsalatiga.ac.id/16242
http://e-repository.perpus.iainsalatiga.ac.id/17598