If you have to reference frequently as part of your course, you will probably learn how to construct a reference. However, there are also several tools, which let you create a reference and copy and paste it into your work. 

Once you are at Cambridge you will also have access to Cite them Right. This in an interactive electronic resource that gives you referencing examples for a huge range of resources. As well as including books and journal articles, it shows you how to cite materials which may be specific to your discipline such as legal materials, media, art, unpublished reports, and government publications. You can choose which format (e.g. Harvard, MLA etc) you wish to cite in. When you have your Raven login, you will be able to access it from iDiscover (the combined catalogues of Cambridge University Libraries) or by searching it on the A-Z database list. 

There are also two freely available tools you could try:

• Zoterobib lets you add a title, ISBN, DOI, PMID or URL to quickly generate a formatted reference or bibliography. You can easily change reference style too. You don't need to create an account; just create and export it straight to your work. The unique link will let you return to it later or share with someone else.
• EasyBib is another free tool that lets you create references to copy and paste into your work.
• Cite It Now is an app which lets you scan the barcode of a book to instantly produce its citation in your chosen style, and you can export your references into popular reference managers or as a PDF. 

iDiscover and lots of online resources also let you generate a reference for a particular text although you may have to edit the look of the reference as it may be in a different style to the one you have to use.

You need to take records of everything you encounter during the research process. You can do this on paper, but it is advisable that you keep it in very good order. Or you could use a notebook, but again, then we recommend that it is carefully indexed. And what would happen if you lost all of that work? 

Reference management software will let you download references from catalogues and databases, store pdfs and take notes, keeping everything in the same place and searchable so you can track it down later. Plus, it is all backed up online so that you can access it whichever device you are working on.