Zotero is free citation manager that stores your references and articles, and will even format a bibliography for you! Zotero is easy to use and will help you cite your sources your sources correctly. See the research guide Store Your References and Articles + Create Bibliographies to learn how to use this valuable tool.
Paraphrasing (writing in your own words) and Citing (quoting others' words and attributing an idea to its source) are important skills to have because any time you would like to advance your own argument, citing data and reputable sources will strengthen your message, and, help you to avoid plagiarism. Here are some resources to assist with these skills: