http://e-repository.perpus.iainsalatiga.ac.id/18242
http://e-repository.perpus.iainsalatiga.ac.id/17906
http://e-repository.perpus.iainsalatiga.ac.id/17782
http://e-repository.perpus.iainsalatiga.ac.id/17787
http://e-repository.perpus.iainsalatiga.ac.id/17404