Zotero is a free research tool which collects, manages, organises and cites your research sources (and according to our librarian, it is the best and most useful research tool available). Zotero does three utterly brilliant things:
1) It works with your web browser to identify and store bibliographic information about the resources you're using, often with the click of a button.
2) It allows you to store PDFs and notes without clogging up your computer - it all goes in the Zotero cloud, where it is backed up, accessible from anywhere, and very safe.
3) It helps you produce beautiful footnotes and bibliographies in pretty much any referencing style, and if you use Microsoft Word or Google Docs, it will do this as you're writing.
Zotero is straightforward to set up and use, but it can take some getting used to, especially if you've always done this work manually before.
For reference, the MHRA guide (3rd ed.) is available online.
If you want to learn how to use Zotero, then Helen Murphy, our librarian (and resident Zotero evangelist) would be happy to meet you (virtually) for a 1-2-1 to help you to understand how it works.
There are plenty of guides online, so have a look at the CamGuides page on referencing software for more links. This also has information about other referencing software if you'd rather try a Zotero alternative.