If have ever had to write Reports, Essays or Theses, you will have had to reference what you have used in your report. If you mention something that someone else has written, you need to give them credit by referencing them.
The Harvard Referencing System is one of the preferred layouts for these references. It is a relatively strict way of arranging the bibliographical information.
This tool takes in the raw information - author, title, year of publication - and creates the reference in the correct form.
You can then highlight and copy this into the bibliography section of your report.
You then reference this next to the relevant section within your essay in the format (Author, Year) such as (Smith, 2005).
e.g. The arms race between Bees and Wasps has escalated in recent decades, and many now suggest a full-scale war is inevitable (Benson, 2003).
Check out the other tools available from Neil's toolbox.