http://e-repository.perpus.iainsalatiga.ac.id/16329
http://e-repository.perpus.iainsalatiga.ac.id/16332
http://e-repository.perpus.iainsalatiga.ac.id/16298
http://e-repository.perpus.iainsalatiga.ac.id/16204
http://e-repository.perpus.iainsalatiga.ac.id/15506