Help:Introduction to referencing/tabs

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One of the key policies of Wikipedia is that all article content has to be verifiable. This means that a reliable source must be able to support the material. All quotations and any material whose verifiability has been challenged or is likely to be challenged must include an inline citation of a source that directly supports the material.

If you are adding such new content, it is your responsibility to add source information along with it. Material provided without a source may be removed from an article. Sometimes such material will be tagged first with the {{citation needed}} template to give editors time to find and add sources.

This tutorial will show you how to add inline citations to your articles, and also briefly explain what counts as a reliable source.

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