Avoiding plagiarism and acknowledging your external sources completely and accurately are vital parts of the writing process. Your credibility as a writer and the reception that you work will receive from readers may depend on how well you acknowledge your sources. By following the guidelines presented in this chapter and by seeking out more knowledge about the rules of citing and documenting from the publications listed in this chapter, you will become a more competent, more professional, and more credible writer. This chapter covers only the basics of source citing and documenting. For more resources this topic and the various styles of documentation, see the Appendix to this book.