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All published derivative works must use exactly the same license as the original: if you use the work, you're forced to use the same license for your own original work as well. If your work is using a different license, you can't use the copyleft license, even if your work is also using a (different) copyleft licence.
Since most recently-created works are copyrighted, almost any Wikipedia article which cites its sources will link to copyrighted material. It is not necessary to obtain the permission of a copyright holder before linking to copyrighted material, just as an author of a book does not need permission to cite someone else's work in their bibliography .
Wikipedia:Reusing Wikipedia content: the main page covering your rights and what you're allowed to do (and not do) in order to legitimately use material you see here. Public domain and fair use: A quick guide to these two terms, and how to tell if they apply for material you want to use on Wikipedia.
In such a case, the material should be identified as from an external source (on the image description page, or history page, as appropriate). As "fair use" is specific to the use that you contemplate it is best if your describe the fair use rationale for such specific use either in hidden text in the article or on the image description page ...
Fair use allows us to quote short sections from copyrighted primary sources, if relevant to explaining the topic of an article. For instance, we can quote a sentence or two from a movie review in an article on the movie, or quote a small portion of a modern poem in order to illustrate its style.
Wikipedia (and all Wikimedia projects) strongly prefer "free" files. Where no free file exists, it is sometimes permissible to use a non-free (copyright-protected) file under the "fair use" provision. Fair use, in the United States, is the legal right to use copyright-protected materials under certain conditions.
A statement by you, made under penalty of perjury, that the notice is accurate and that you are the copyright owner or authorized to act on the copyright owner's behalf; and; An electronic or physical signature (which may be a scanned copy) of the copyright owner. A complaint can be submitted by: Sending a letter to our registered copyright agent.
The license stipulates that any copy of the material, even if modified, must carry the same license. This means that anyone would be licensed to distribute the material, possibly for a fee (we would distribute your work free of charge).