http://e-repository.perpus.iainsalatiga.ac.id/17910
http://e-repository.perpus.iainsalatiga.ac.id/17382
http://e-repository.perpus.iainsalatiga.ac.id/18571
http://e-repository.perpus.iainsalatiga.ac.id/18316
http://e-repository.perpus.iainsalatiga.ac.id/19437