Thread:Tupka217/@comment-33214928-20171108155556/@comment-1038387-20171108160448

That Batman page is for the New Earth version, so 1985-2011. You first listed an issue from Batman Vol 2, which is Bruce Wayne (Prime Earth).

The problem with the second source, The Essential Batman Encyclopedia, was that it shouldn't be formatted like that. "EBME" also (to my knowledge) does not differentiate between different universe versions, so it's unclear which version it counts for. It could just as well be the Earth-One version. An additional point of criticism is that EBME is huge, and so without a citation to a specific entry or page number, it's useless as a source.

The best sources would be primary or semi-secondary: Secret Files, Who's Who, annuals, or single issues.