http://e-repository.perpus.iainsalatiga.ac.id/10650
http://e-repository.perpus.iainsalatiga.ac.id/10453
http://e-repository.perpus.iainsalatiga.ac.id/10286
http://e-repository.perpus.iainsalatiga.ac.id/10353
http://e-repository.perpus.iainsalatiga.ac.id/10562
c 1.2 olah