http://e-repository.perpus.iainsalatiga.ac.id/11978
http://e-repository.perpus.iainsalatiga.ac.id/11993
http://e-repository.perpus.iainsalatiga.ac.id/9616
http://e-repository.perpus.iainsalatiga.ac.id/9276
http://e-repository.perpus.iainsalatiga.ac.id/9793