http://e-repository.perpus.iainsalatiga.ac.id/13851
http://e-repository.perpus.iainsalatiga.ac.id/14343
http://e-repository.perpus.iainsalatiga.ac.id/12672
http://e-repository.perpus.iainsalatiga.ac.id/12002
http://e-repository.perpus.iainsalatiga.ac.id/11809