It is very important to evaluate the information you intend to use to ensure that it is from an authoritative source and is appropriate for your research. For more information use these guides for evaluating sources:
You should acknowledge your sources whenever you use a source of information:
When you are taking something from another source, you are taking it out its original context and putting it into a new context - your own assignment. You must make sure it fits properly into this new context. This means: