Update README.md

Author: kthood

README.md

@@ -5,4 +5,8 @@ is a companion course for students in Calculus 3 who have completed Calculus 1 &
 Students learn applications of multidimensional data and get hands-on practice with 
 microcontrollers, such as the Raspberry Pi Pico, and a variety of accessory sensors.
 
-You can browse an [HTML version of the labs online](https://thedatasciencelabs.github.io/DataLab_Multivariate_Calculus) as well.
+You can browse an [HTML version of the labs online](https://thedatasciencelabs.github.io/DataLab_Multivariate_Calculus) as well.
+
+## License
+
+This book is licensed under the [Creative Commons Attribution 4.0 International License](https://creativecommons.org/licenses/by/4.0/).