http://e-repository.perpus.iainsalatiga.ac.id/17941
http://e-repository.perpus.iainsalatiga.ac.id/18861
http://e-repository.perpus.iainsalatiga.ac.id/18991
http://e-repository.perpus.iainsalatiga.ac.id/19293
http://e-repository.perpus.iainsalatiga.ac.id/19196