This guide will help you understand why you need to reference. It also has a guide on how to use Harvard or Vancouver style referencing for a variety of different resources you might use for your academic work, including books, journals, conference proceedings, websites, social media and more.
Reference management software packages can help you:
There is a range of different software available; UCL Library Services provides support and guidance for Endnote, Zotero and Mendeley. These are all available to download for free or under UCL licences.