Some time ago, I went to a workshop/conference on the specific topic in my field. It was a small event, with not proceedings published. I would like to discuss it in an upcoming paper, in order to state that:
it was discussion with X and Y, spurred by the workshop on Z, which initiated this new direction of research.
in the spirit of giving credit where credit is due. Now, I could leave it in the text, or cite it as “private communication from X at Z”, or cite it directly in my references:
Workshop on Z, Big City, Country (2012)
Journal style doesn't say anything of this, but generally calls for references with superscript numbers. So, what is the best option to cite a whole workshop/conference? (and not a specific presentation)