[Zope] What is the Best Way to Include CSS Stylesheets in Zope

I would like for all of my Zope pages to use a CSS stylesheet by default. Ideally I would be able to keep the reference to the stylesheet in only one place in Zope and have changes to the stylesheet filename propagate globally. The Beehive book does not mention anything about how to integrate CSS stylesheets into Zope. Does anyone what is the best way to do so?