http://e-repository.perpus.iainsalatiga.ac.id/17837
http://e-repository.perpus.iainsalatiga.ac.id/17456
http://e-repository.perpus.iainsalatiga.ac.id/17452
http://e-repository.perpus.iainsalatiga.ac.id/17111
http://e-repository.perpus.iainsalatiga.ac.id/19571