http://e-repository.perpus.iainsalatiga.ac.id/20298
http://e-repository.perpus.iainsalatiga.ac.id/18181
http://e-repository.perpus.iainsalatiga.ac.id/18076
http://e-repository.perpus.iainsalatiga.ac.id/18145
http://e-repository.perpus.iainsalatiga.ac.id/18399