diff --git a/MTUS-W9-adult-episodes-data-processing.Rmd b/MTUS-W9-adult-episodes-data-processing.Rmd
index d584536bba4d9b46dc5ce2db55117dbb0f995469..f81aaace8463cbf56c9f4862069ffcddf293e8a6 100644
--- a/MTUS-W9-adult-episodes-data-processing.Rmd
+++ b/MTUS-W9-adult-episodes-data-processing.Rmd
@@ -901,5 +901,7 @@ Key packages used:
  * data.table - for fast (big) data handling [@data.table]
  * knitr - to create this document [@knitr]
  * dplyr & dtplyr - for data manipulation [@dplyr][@dtplyr]
+ * stargazer - for pretty tables [@stargazer]
+ * ggplot2 - for slick graphs [@ggplot2]
  
 # References