http://e-repository.perpus.iainsalatiga.ac.id/17503
http://e-repository.perpus.iainsalatiga.ac.id/17615
http://e-repository.perpus.iainsalatiga.ac.id/18409
http://e-repository.perpus.iainsalatiga.ac.id/18294
http://e-repository.perpus.iainsalatiga.ac.id/17794