Citation guides are resources that help individuals properly reference sources in their writing. They provide specific formats and rules for citing books, articles, websites, and other materials, ensuring that credit is given to original authors. Common citation styles include APA, MLA, and Chicago, each with its own guidelines. These guides are essential for academic integrity, as they help prevent plagiarism by showing how to acknowledge the work of others. Many universities and libraries offer citation guides, and there are also online tools available to assist with generating citations in the correct format.