Wikipedia:可靠来源：修订间差异

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當描述事實時，維基百科的條目應該要[[Wikipedia:列明来源|列明來源]]<ref name="auto">Jimmy Wales: "[...] I do agree [...] that more sources is good, and [...] one of our goals will be to provide more articles with more extensive information about "where to learn more", i.e. cite original research, etc., as much as we can." ("[http://interviews.slashdot.org/article.pl?sid=04/07/28/1351230&tid=146&tid=95&tid=11 Wikipedia Founder Jimmy Wales Responds]", ''[[Slashdot]]'' interview, July 2004)</ref>，這是因為維基百科是屬於'''[[WP:PSTS|三次文獻]]'''，所以維基百科不能引用自己本身的條目文章來當作'''來源'''。其他還有許多可靠的三次文獻可以引用，例如《[[大英百科全書]]》。不過請注意在《大英百科全書》、《世界全書》（''World Book Encyclopedia''）、以及[[Encarta|微软Encarta百科全书]]中，未署名的條目是由其非該領域專業的工作人員所撰寫的，因此那些條目可能不會有與專業人士撰寫的條目相同的可信度，無論如何，那些條目以維基百科的目標來說還是被認可為可靠的來源。當維基人有想要撰寫比以上所提的百科全書還要高品質的野心時<ref name="auto1">Jimbo Wales: "Our goal is to get to Britannica quality, or better." ("[http://www.nature.com/news/2005/051212/full/438900a.html Internet encyclopaedias go head to head]" in ''[[Nature (journal)|Nature]]'', December 2005)</ref>，若只仰賴上述的[[WP:PSTS|三次文獻]]是不能滿足其野心以及其所瞄準的高品質的。因此，除了因為在利用[[WP:第一手來源|一次文獻]]時要小心注意使用（見上文），'''[[WP:第二手來源|二次文獻]]'''是維基百科所依賴的主要資料引用來源。

 

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When reporting facts, Wikipedia articles should [[Wikipedia:Cite sources | cite sources]].<ref name="auto"/> Wikipedia is a tertiary source. Wikipedia can not cite itself as a ''source'', while that would be a [[wikipedia:avoid self-references|self-reference]]. There is a wealth of reliable information in tertiary sources such as the ''[[Encyclopædia Britannica]]''. Note that unsigned ''Encyclopædia Britannica'', ''World Book'', and ''Encarta'' articles are written by staff, who may not be experts, and the articles may therefore not have the same level of credibility, but they are regarded as reliable sources for Wikipedia's purposes. When wikipedians have the ambition to write a ''better'' encyclopedia entry than those extant,<ref name="auto1"/> it does not suffice to rely on the content of such tertiary sources. Therefore, in general, as ''primary sources'' are also to be treated with caution (see above), ''secondary sources'' are the stock material on which Wikipedia articles depend for their references.