1) add this code beside the sentence, and change "http://www.Link.com" with a newspaper, magazine, internet link, etc. <ref>[http://www.Link.com]</ref>
2) add this to the bottom of the page, if and when the above code shows an error <references />
Creating a whole new article is a different matter. My suggestions for the creation of a new article...
If you are new here and want to create a new page in Wikipedia, it's better to ask a Moderator/Administrator for help creating it, since that will presumably give the page more weight. If you try to create it without any Authoritative involvement, as per the Five pillars of evil, these following experiences may apply:
Wikipedia:Deletion policy does not matter, all new articles will be deleted fast by some moderator/authority's choice without mentioning a reason, & non user space articles without a notice.
Wikimedia Commons is a library of free Audio, video and image files; where supposedly everyone is welcome and allowed to contribute. My personal experience with Wikimedia Commons so far has been terrible.
I am now discovering only those who believe in Ownership of Knowledge by Humans are allowed to contribute, and All Files Attributed to God will be deleted. In my experience Wikimedia is rampant with arrogant, paranoid Deletionists trying to protect what they believe is their own turf, Mafia style.
A record of deletions and discussions about deletions of my creations at Wikipedia Commons:
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