Most writing projects will require you to evaluate and incorporate the work of others into your own research. Whenever you refer to the work of other authors, either to their ideas or to their exact words, you must give proper credit to your sources. Using someone else's ideas, work, or words as your own without giving them proper credit constitutes plagiarism, whether intentional or not.
The following are examples of the major styles of citation used in academic writing.
Citation Style Guides
Web and Library Info