Citation management software allows you to store and organize your resources and citation information easily. You will be able to create databases of citations or references to books, journal articles, and web sites used in your research. The software allows you to easily insert your citations within a research paper as in-text references, footnotes, or endnotes, and the creation of a formatted bibliography using a citation style of choice (e.g., APA, MLA, Chicago, etc.).
Several free and open-source Citation Management Tools are available. Zotero, Mendeley, and EndNote are three popular tools. Zotero is popular for use in the Social Sciences and Humanities, while Mendeley is popular for use in the Sciences.