Whether you are re-mixing other OER to create your own OER or just assigning OER for a class, you should properly credit the original OER. All materials released under Creative Commons (CC) licenses require attribution. If something is labeled CC0, it is public domain, not under a CC license, and does not require attribution.
All CC attributions should include the following basic information:
For example, this guide should be cited as follows: "Open Educational Resources (OER)" by Salisbury University Libraries, licensed under CC BY 2.0
For more information, visit Best practices for attribution (Creative Commons).
Creative Commons is a nonprofit organization that offers a set of copyright licenses enabling creators to give people the right to freely use, share, and build upon their works.
Creative Commons License Selector -- A tool that allows you to receive an already formatted HTML code. Simply answer a few questions and fill in the fields you need.
For a detailed legal overview of the Creative Commons licenses, see Creative Commons Licenses Legal Pitfalls: Incompatibilities and Solutions.
Public Domain (CC0). Allows you to waive all rights and place your works in the public domain.
Attribution (CC BY). Allows others to distribute, remix, tweak, and build upon your work, even commercially, as long as they credit you for the original creation.
Attribution-ShareAlike (CC BY-SA). Allows others to remix, tweak, and build upon your work even for commercial purposes, as long as they credit you and license their new creations under the identical terms.
Attribution-NoDerivs (CC BY-ND). Allows others to distribute your work, commercially or non-commercially, as long as it is passed along unchanged and in whole, with credit to you.
Attribution-NonCommercial (CC BY-NC). Allows others to remix, tweak, and build upon your work non-commercially. Although others must acknowledge you and use your work non-commercially, they don’t have to license their derivative works on the same terms.
Attribution-NonCommecial-ShareAlike (CC NC-SA). Allows others to remix, tweak, and build upon your work non-commercially, as long as they credit you and license their new creations under the identical terms.
Attribution-NonCommercial-NoDerivs (CC BY-NC-ND). Allows others to download your works and share them with others as long as they credit you, but they can’t change them in any way or use them commercially.
(Adapted from creativecommons.org)