APA

If a conference paper is published as part of a book, use the same format as for a book or a book chapter. 

In-text citation:

Jones (1999) explained…

(Wilkinson, 1999)

Reference list:

Wilkinson, R. (1999). Sociology as a marketing feast. In M. Collis, L. Munro, & S. Russell (Eds.), Sociology for the New Millennium. Papers presented at The Australian Sociological Association, Churchill, Victoria: Celts.

If the paper is published informally, include the month and year of the symposium in the reference. 

In-text citation:

Smith (2006) proposed...

(Smith, 2006)

Reference list:

Smith, P. (2006, March). How to make the most of the time you spend commuting. In M. Fox & P. Smith, Work-life balance in today's world Conference, London. 

If the proceedings are published in book form, follow the format for books.

In-text citation:

Bickman and Ellis (1990) said that...

(Bickman & Ellis, 1990)

Reference list:

Bickman, L., & Ellis, H. (Eds.). (1990). Preparing psychologists for the 21st century: Proceedings of the National Conference on Graduate Education in Psychology, University of Utah, 1988. Hillsdale, NJ: L. Erlbaum.

If the proceedings are published regularly online, replace the publisher and place of publication with the URL.