General Discussion
One really ought not to put information not available to our characters on the actual page itself. For example, all post-987 AD texts and events should not be included in an entry. If there is a text in the 1300s about how Alexander saved Novgorod from stampeding gryphons or whatever, one really shouldn't add this into the entries for Alexander, Novgorod, or Gryphon.
Likewise, citing sources should be discouraged for the same reasons. There is no OED in 987 AD.
If one wants to add any of this kind of information (although one really shouldn't), one should do so in the discussion page of the entry.
I understand this is an online document about a D&D game taking place in 2005, but in an effort to preserve the feel of tenth century documents (and the illusuion of the game), we really ought to follow these guidelines.
This is also why I was against putting stats into a character description. It just breaks the illusion of the game.