Update README.md

brentthorne · web-flow · commit 9606c399e81f · 2019-02-06T21:39:16.000-05:00
diff --git a/README.md b/README.md
@@ -30,7 +30,7 @@ To cite `posterdown` in publications, use:
 A BibTeX entry for LaTeX users is:
 
 ```
-  @Manual{,
+  @Manual{posterdown,
     title = {posterdown: An R Package},
     author = {W. Brent Thorne},
     year = {2019},
