These Creative Commons help guides provide instructions for use:
These terms apply to ALL Creative Commons Licenses:
Quick overview of the differences between CC licenses:
[The images in this box are adaptations of the terrific "How to Attribute Creative Commons Photos" infographic.]
CC0 and the Public Domain
For works that you wish to immediately enter the public domain, such as data, computer code, or photographs, there is also the CC0 license. Unlike other CC-licenses, Public Domain works require no attribution and are owned by the public.
These links go directly to the terms of each license.
(Perfect for data and code)