If you have used other sources, you will need to provide either a reference list or a bibliography at the end of your text.
A reference list is normally a list of the citations that have appeared in the body of your work. How you arrange it will depend on the referencing style your school uses.
A bibliography lists all the sources that you have consulted in your research and, because it includes sources you may not have cited in your work, it is usually arranged alphabetically by surname.
Many people use these terms interchangeably so if you are unsure about which one to include, ask your tutor.