RefWorks is a tool to help you to manage your references. You can export references directly from the library catalogue, databases and even Google Scholar directly into RefWorks and format them into Harvard SSU or another style as required. There is also a tool that can grab webpages and import them into your account.
If you use RefWorks it will do most of the work for you, but it will make mistakes as it can only work with the data it can see - garbage in, garbage out. Check the output before submitting anything.
For more help and guidance visit the RefWorks subject guide.