By contributing content to the wiki all participants give permission that under CC-BY-NC-SA anyone can

 * Share — to copy, distribute and transmit the work
 * Remix — to improve, modify, or adapt the work

So long as they:

• Attribute. They must cite and link back to the source (this wiki).
• Don't Sell it. They may not charge money for this work or provide it as part of a commercial service.
• Share Alike. If they alter, transform, or build upon this work, they must distribute the resulting work only under the same or similar license to this one.
• Link to the license. They must make clear to others the license terms of this work. The best way to do this is with a link.

Authors can still:

• Use any of the content they have submitted any way they like (including selling it) as the copyright holder.
• Waive any of the above permissions for content they have contributed if they are asked and wish to.
• Cite their own websites as a source for previously published material.

Authors cannot:

• Post content that is copyrighted elsewhere without permission.

Content from: "creativecommons.org" http://creativecommons.org/licenses/by-nc-sa/2.0/ is "cc-by" http://creativecommons.org/licenses/by/3.0/