As you get started with your research, it's a great idea to manage your citations carefully. You might consider using citation management software to do this, especially if you are working on a literature review or other major project. UK subscribes to EndNote which you can download via the UK Download site. There are other free tools as well, such as Zotero.
This guide provides information on accessing EndNote as well as some frequently asked questions related to its use.
The company that supports EndNote provides a number of free guides and tutorials to help in its use.