http://e-repository.perpus.iainsalatiga.ac.id/12035
http://e-repository.perpus.iainsalatiga.ac.id/12273
http://e-repository.perpus.iainsalatiga.ac.id/11999
http://e-repository.perpus.iainsalatiga.ac.id/10802
http://e-repository.perpus.iainsalatiga.ac.id/10839