diff --git a/notebooks/References Notebook 2020.ipynb b/notebooks/References Notebook 2020.ipynb
index 90809a4..f0fd7cd 100644
--- a/notebooks/References Notebook 2020.ipynb	
+++ b/notebooks/References Notebook 2020.ipynb	
@@ -4,8 +4,8 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "Copyright 2020 Frances M. Skinner\n",
-    "SPDX-License-Identifier: Apache-2.0\n",
+    "Copyright 2020 Frances M. Skinner, Christian Hill\n",
+    "Apache-2.0 License\n",
     "\n",
     "Licensed under the Apache License, Version 2.0 (the \"License\");\n",
     "you may not use this file except in compliance with the License.\n",