Referencing is a system used in the academic community to indicate where ideas, theories, quotes, facts and any other evidence you have used to support your assignments can be found.
When you are writing a piece of work and use someone else's words or ideas you must reference them.
This means that you need to include details about all the sources you have used, both within the text of your assignment (in-text citations) and at the end of your work (reference list).