* [http://creativecommons.org/licenses/by/3.0/ Creative Commons Attribution License (CC-BY 3.0)]
   * [[Image(http://i.creativecommons.org/l/by/3.0/88x31.png)]]
 * [http://opened.creativecommons.org/definition Open Educational Resource]
   * [[Image(http://i.creativecommons.org/d/oer/88x31.gif)]]