1. L. Anselin, Spatial Econometrics: Method and Models (Kluwer Academic Publisher, The Netherlands, 1988)
2. Badan Pusat Statistik, Data dan Informasi Kemiskinan Kabupaten/Kota 2014. (Badan Pusat Statistik, Jakarta, 2015)
3. A.S. Fotheringham, C. Brunsdon and M. Charlton, Geographically Weighted Regression. (John Wiley and Sons, Chicester UK, 2002)
4. Local least absolute deviation estimation of spatially varying coefficient models: robust geographically weighted regression approaches
5. M.P. Todaro and S.C. Smith, Economic Development 11th Edition (Pearson Education, Boston, 2012)