Wikipedia:Citation and reuse of Wikipedia content
Wikipedia is designed to be reused and disseminated; it is in this and only in this that it is a "free" encyclopedia. But this reuse must be done according to the rules of the "Creative Attribution-ShareAlike 3.0 Unported License" (CC BY-SA 3.0). For the reuse, copying or modification of all or part of the text of an article, you must:
indicate that the reused, copied or modified content is under CC BY-SA 3.0,
allow the identification of the authors by giving a web address to the Wikipedia article, or by giving a list of authors (paternity),
indicate whether you have modified the original Wikipedia content,
leave all derivative works under the same license (share alike). An automated tool, "Cite this page", accessible in the left column of the page of each article in the "toolbox" and at the de-page of all articles, allows you to get all the ways to correctly credit a reuse of a Wikipedia article. You can also access this tool using the following button:
Quote a page
Important preliminary remark: Wikimedia Foundation, host of Wikipedia, does not hold rights on the encyclopedic texts and images that it hosts (with the exception of its own logos). Consequently, it cannot issue a reproduction authorization. It is therefore useless to write to Wikipedia's contact addresses to request permission to reproduce (except in very special cases, such as the Wikipedia logo, protected by copyright and trademark law).
As part of the right of short quotation, you are not obliged to submit to all the obligations of CC BY-SA 3.0: you only need to mention the author and the source. You will find out how to cite a Wikipedia article using the Special:Cite tool.
On the other hand, the obligations of CC BY-SA 3.0 are rigorous for:
quotes that are not made:
"for the purpose of criticism, controversy, review, teaching, or in scientific work, in accordance with the honest practices of the profession" (Belgium: law of June 30, 1994),
that does not constitute "fair use [...] for purposes of criticism or review" (Canada: Copyright Act Section 29.1),
which are not used for the "critical, polemical, educational, scientific or informative nature of the work in which they are incorporated" (France: Intellectual Property Code article 122-5)
or which do not serve as “commentary, reference or demonstration” (Switzerland: federal law on copyright and related rights).
Reuse of Wikipedia content outside of short citation permitted by law
Note: Wikipedia does not offer legal advice. Formally, each article belongs to its author(s) and is made available to the public under the terms of CC BY-SA 3.0. Most images and other media are also protected by one or more licenses mentioned on the description page of the medium. See also Wikipedia:Copyright.
The practical terms to follow are as follows: we advise you to refer to the text of CC BY-SA 3.0 and to the bibliographic conventions in force in your country to reuse Wikipedia content:
Reusing plain text, no images
The textual content of Wikipedia is under CC BY-SA 3.0, free license, which allows free reuse of it, subject to the conditions