When you search for information, you're going to find lots of it . . . but is it good information? You will have to determine that for yourself, and the CRAAP Test can help. This document created by Librarians at California State University Chico can help you when you are evaluating information sources.  

When to cite:  

1) When you directly quote another's words or writing - this happens in your project description.

2) When you paraphrase another person's ideas.

3) When you summarize information or facts.

What about common knowledge? 

It's a bit ambiguous, but there are two tests you can use: 

1) Quantity:  can the fact be found in numerous places? (and not just repeated over and over on the web from one source...)

2) Ubiquity:  is the fact likely to be known by a lot lof people? 

When in doubt, cite.

Sources should follow MIME style manual, which is based on IEEE style, a numbered style. 

Be sure to cite your images, tables and figures correctly.