I'd like to properly refrence an article whose author is mentioned as A Consensus Document (it has some 25 authors).
I have never seen this kind of authorship before; the citation entry generated by the website does not contain an "Author" field (which is problematic for BibTeX and somewhat intriguing on a personal level).
I don't know what would be appropriate to remedy this situation. Would adding an author such as Consensus Document make sense?
Otherwise, could I just add the first author in alphabetical order1, or would this misrepresent the authorship?
Another possible alternative is that, since one of the authors (not the first one in alphabetical order) wrote a foreword to the paper, maybe he could be considered as the first author instead?
1 The authors are only presented in alphabetical order.
.bib
entry and let BibTeX shorten the list when creating the label. But you cannot assume somebody is first author unless you know they are, which you don't. Indeed, insofar as 'A Consensus Document' means anything to me, it suggests that none of the authors should be considered as having priority. But, As Alan says, this is off-topic for this site. The correct strategy may depend on: your discipline, the kind of document you are writing, how/where it will be published, &/or the style used for the references and citations.