In several library catalogues and databases you can get help with citing the references that you have found. You can also have a look at this guide for help with citing within the Harvard System and style from Anglia Ruskin University.
There are several citation management tools that help you save references from databases and catalogues. With a plugin in your word processor, you can easily cite the references in your text and the program creates a reference list in the format style you choose. A few examples of these tools are: