Added tufte reference

bibliobase.bib

@@ -68870,3 +68870,10 @@ year = {2012},
   pages={461--473},
   year={2013},
 }
+
+@book{tufte2001visual,
+  title={The Visual Display of Quantitative Information},
+  author={Tufte, Edward R},
+  year={2001},
+  publisher={Graphics Press,Cheshire}
+}