Copyright - exclusive rights of the creator over distribution of the information/product.
Plagiarism - taking someone else's work and using it as your own.
Fair Use - brief exerpts of copyright material may be used for certain situations such as critique, teaching, news reporting, and research without permission.
With countless sources on subjects readily available online, it is important that we understand these concepts and cite the work we do correctly so to avoid plagiarism and to give credit to the creator of the work. Below are a few other websites for two common formats of citation that can help avoid plagiarism by citing information correctly.
Here is a video by Beth Jones and Gina Hurley from the Purdue Online Writing Lab about APA formatting.