diff --git a/pandas/pandas.ipynb b/pandas/pandas.ipynb
index a758c35..90f080c 100644
--- a/pandas/pandas.ipynb
+++ b/pandas/pandas.ipynb
@@ -6,6 +6,8 @@
    "source": [
     "# Pandas\n",
     "\n",
+    "Credits: The following are notes taken while working through [Python for Data Analysis: Data Wrangling with Pandas, NumPy, and IPython](http://www.amazon.com/Python-Data-Analysis-Wrangling-IPython/dp/1449319793) by Wes McKinney\n",
+    "\n",
     "* Series\n",
     "* DataFrame\n",
     "* Reindexing\n",