http://e-repository.perpus.iainsalatiga.ac.id/19477
http://e-repository.perpus.iainsalatiga.ac.id/19926
http://e-repository.perpus.iainsalatiga.ac.id/19573
http://e-repository.perpus.iainsalatiga.ac.id/19084
http://e-repository.perpus.iainsalatiga.ac.id/18907