Editor(s). (Surname, followed by initial(s))
Conference Name/Title;
Date of conference;
Conference Location.
Place of publication:
Publisher;
Date of publication.
Example:
Dostrovsky JO, Carr DB, Koltzenburg M, editors. Proceedings of the 10th World Congress on pain; 2002 Aug 17-22; Boston. San Diego: IASP Press; c2003.