When searching Google...
Use keywords and AND and OR terms to narrow your search results.
Optionally, use Tools, then Any Time to select a custom date range and find article from a certain time period.
Try adding the domain ending site:.edu to find credible articles from colleges and universities.
(The first few articles will come from Google Scholar, which is a reliable website for finding sources).
To find government data, add site:.gov to the end of your search.
When you use sources outside of the library article databases, like articles or websites from Google, the citation is not usually provided.
You will need to form your own citation "from scratch" using: