I dug this old interview with Stephenie Meyer on the release of breaking dawn. She says BD is influenced by Shakespeare's Mid Summer Night's Dream and another mystery novel she can't talk about!!!
I believe the second one isn't a novel, it's chapter 12 in the book of Revelation: The story of the "woman clothed with the sun" because she suffers at birth and challenges the devil (just like Bella does and confronts Aro), another clue is the French version of breaking dawn it is called Révélation in a clear reference to Meyer's inspiration.
Why wouldn't Meyer talk about it, is that it is a secret to be revealed at the time of the apocalypse:) and she can't be responsible for an interpretation of a biblical futuristic prophecy.
As for how I claim to know that: I have an MA in American Literature and personal interests in the Apocalyptic genre!
This is Apotamkin's theory should you wish to quote that's how you should refer to it:)