http://e-repository.perpus.iainsalatiga.ac.id/17602
http://e-repository.perpus.iainsalatiga.ac.id/17286
http://e-repository.perpus.iainsalatiga.ac.id/17338
http://e-repository.perpus.iainsalatiga.ac.id/18598
http://e-repository.perpus.iainsalatiga.ac.id/16508