1. To avoid plagiarism.
2. To add credibility to your work by demonstrating that you have done proper research and consulted other sources before you write on a topic.
3. To help the readers, including your professors, to track down the sources you have used.
4. It is a standard practice for scholars and students engaged in research and writing. It is the ethical thing to do. You are being a responsible scholar when you cite sources and acknolwdge other scholars for their ideas.
Why We Cite from UNC Writing Center
Look to the right and under the Tools, click on Cite.