This is going to be a very short post 

pages can export epub and pdf but to export epub you need to update pages to 4.03 and you need the epub template for 4.03 unfortunately apple updated it to a version that needs pages 5.02 and nobody wants pages 5.02 So I went looking and i found it

The original epub style guide and template for pages 4.03 or iWork 09 pages epub template