There are over 6,000 styles in RefWorks so you are likely to find one which suits your requirements. Ocassionally though you may wish to change or add an element to the style you have chosen. You can customise your style using the 'Citation Style Editor.
Note: you will need to add punctuation or additional informaiton to some fields e.g. in the example above, round brackets have been added to the publication year and ''pp.' has been added to the pages field so that this precedes the page numbers. It can sometimes be difficult to get this additional information in the correct location - always test your bibliography to see how your customisation appears.