When preparing a piece of written work you will come across other peoples' ideas, theories or data which you will want to reference in your own work.
Making reference to other work is called citing.
Full details of the works that are cited are given at the end of your written work in the form of a reference list.
Items that you have used in your background reading, but not cited, may be included under the heading 'bibliography', after the references list.
This tutorial will show you how to cite and reference in a standard manner.
There are different conventions for referencing cited works and background reading. These may depend on your subject or department. Check with your tutor.