http://e-repository.perpus.iainsalatiga.ac.id/10883
http://e-repository.perpus.iainsalatiga.ac.id/12108
http://e-repository.perpus.iainsalatiga.ac.id/12035
http://e-repository.perpus.iainsalatiga.ac.id/12273
http://e-repository.perpus.iainsalatiga.ac.id/12198