Use this format for eg. exhibition catalogues.
You will need:
Author of catalogue’s Surname, Initials. (Year) Title of exhibition. Location and date(s) of exhibition [Exhibition catalogue].
Urbach, P. (2007) Reform! Reform! Reform! Exhibition held at the Reform Club, London 2005-2006 and at Grey College, Durham University, March 2007 [Exhibition catalogue].
In-text citation: (Urbach, 2007)