http://e-repository.perpus.iainsalatiga.ac.id/18915
http://e-repository.perpus.iainsalatiga.ac.id/19120
http://e-repository.perpus.iainsalatiga.ac.id/20065
http://e-repository.perpus.iainsalatiga.ac.id/19925
http://e-repository.perpus.iainsalatiga.ac.id/20063