http://e-repository.perpus.iainsalatiga.ac.id/19188
http://e-repository.perpus.iainsalatiga.ac.id/19169
http://e-repository.perpus.iainsalatiga.ac.id/19463
http://e-repository.perpus.iainsalatiga.ac.id/19238
http://e-repository.perpus.iainsalatiga.ac.id/18578