I am currently working on my bachelor's thesis in computer science in Germany. I have created a few charts/graphs, making heavy use of icons downloaded from http://www.thenounproject.com/.
Most of the icons I did use are published under a Creative Commons license. I am not sure how to credit the authors of the icons. The website states the following for books:
The attribution should be displayed either on the same page as the symbol, with the colophon, in the bibliography or Credits section.
The license text (http://creativecommons.org/licenses/by/3.0/us/) states the following for attribution:
If supplied, you must provide the name of the creator and attribution parties, a copyright notice, a license notice, a disclaimer notice, and a link to the material.
I don't think it makes sense to credit the authors of the icons in the bibliography of the thesis though.
How is the usual procedure to give picture credit in theses? Is it considered appropriate to use these kinds of graphics for illustration in academic contexts?