There is not one correct way to attribute materials available with Creative Commons licenses.
Look below the image of a Michigan lighthouse to see four different, but equally correct, ways to attribute this photo to its creator.
Matt Morse's "Untitled." (Photo).
Untitled by Matt Morse.
"Untitled." By Matt Morse (Own work) [CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons. Available at http://commons.wikimedia.org/wiki/File:Michigan_City_Lighthouse.jpg.
Where and how to put your attributions often depends on your medium.
The chart below provides suggestions on how best to place your attributions based on your material.
Image is a page from "Attributing Creative Commons Materials." Creative Commons Australia and the Australian Research Council Centre of Excellence for Creative Industries and Innovation. (CC BY-2.5 AU)