http://e-repository.perpus.iainsalatiga.ac.id/17433
http://e-repository.perpus.iainsalatiga.ac.id/11202
http://e-repository.perpus.iainsalatiga.ac.id/11312
http://e-repository.perpus.iainsalatiga.ac.id/10949
http://e-repository.perpus.iainsalatiga.ac.id/10896