http://e-repository.perpus.iainsalatiga.ac.id/18410
http://e-repository.perpus.iainsalatiga.ac.id/17463
http://e-repository.perpus.iainsalatiga.ac.id/15873
http://e-repository.perpus.iainsalatiga.ac.id/16187
http://e-repository.perpus.iainsalatiga.ac.id/15461