http://e-repository.perpus.iainsalatiga.ac.id/18018
http://e-repository.perpus.iainsalatiga.ac.id/17520
http://e-repository.perpus.iainsalatiga.ac.id/17543
http://e-repository.perpus.iainsalatiga.ac.id/9940
http://e-repository.perpus.iainsalatiga.ac.id/9929