Harvard Styling in MS Word 2007

Hi,

This is probably a stupid question with a simple answer (I hope so anyway) but how do you insert a reference into Word 2007 in the format name (year) as opposed to (name, year)

What I’m trying to get is something like this (Harvard style):

Bloggs et al. (2009) have suggested …

But all I can get is:

(Bloggs et al. 2009) have suggested …

Help is muchly appreciated