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Anyone can create a website or video and then claim to be an expert in a certain field. For this reason, self-published media is often not acceptable as a source. Self-published videos may be used as sources of information about their creator if they meet the requirements seen at restrictions on using self-published sources. The community ...
However, official channels of notable organizations, such as Monty Python's channel, may be acceptable as primary sources if their authenticity can be confirmed, or as a secondary source if they can be traced to a reliable publisher. Videos may also be used as a convenience link for material originally published elsewhere. In all cases, care ...
As an external link: Generally no. Regular websites are strongly preferred, but exceptions are made for official links when the subject of the article has no other Web presence. As a reliable source: * Sometimes. The official page of a subject may be used as a self-published, primary source, but only if it can be authenticated as belonging to ...
External links and references are two important elements of Wikipedia that newcomers sometimes find trouble with. This page is designed to cover only the technical aspects of linking and referencing; it is essential that editors also familiarize themselves with Wikipedia:External links, Wikipedia:Reliable sources and Wikipedia:Citing sources, as well as Wikipedia's various other policies ...
Similarly for breaking news, a contemporary secondary news source can quickly become a historical primary source. Articles of recent current events must be periodically updated with new secondary sources. Sources of any age may be prone to recentism, and this needs to be balanced out by careful editing.
A citation ideally includes a link or ID number to help editors locate the source. If you have a URL (web page) link, you can add it to the title part of the citation, so that when you add the citation to Wikipedia the URL becomes hidden and the title becomes clickable.
A secondary source contrasts with a primary, or original, source of the information being discussed. A primary source can be a person with direct knowledge of a situation or it may be a document created by such a person. A secondary source is one that gives information about a primary source.
Whether a source is primary, secondary or tertiary can depend on the topic that an article is covering. For example, the summary for policy makers from the IPCC is a secondary source for the article Global warming but it would be a primary source if used for the article Intergovernmental Panel on Climate Change. Similarly, a book review in a ...