Library Search is a great place to start to quickly search for quality sources.
Library Search is the best way to find books, which are a valuable source for many topics.
You can choose databases that are specialised for particular subjects or types of information. The Library subscribes to hundreds of databases, and there are further databases available for free on the web.
You can use databases to search for journal articles. They may also contain other types of information such as conference papers, financial data, legislation, news, theses and audiovisual material.
Databases usually have a "Help" section with a detailed explanation of how to perform searches.
How to choose the most appropriate database to find articles on your topic (YouTube, 1m49s):
You may need to search the internet rather than databases for some sources, such as organisational reports.