http://e-repository.perpus.iainsalatiga.ac.id/18139
http://e-repository.perpus.iainsalatiga.ac.id/19019
http://e-repository.perpus.iainsalatiga.ac.id/19109
http://e-repository.perpus.iainsalatiga.ac.id/18124
http://e-repository.perpus.iainsalatiga.ac.id/18009