Navigate to the collection you want to use (or All Documents area or run a search and select items), click "More" from the menu and select "Create bibliography".
You can choose to create a bibliography for selected references or for all of the reference in the collection (or in All Documents if that's the view you are in).
Next, search for and select your bibliography style and click “Create”. Your formatted bibliography will be displayed in your browser for you to copy and paste into any word processing software.
To use a custom output style from your RefWorks account, click here.