Author, title, edition, place of publication, publisher, date. Sometimes you may wish to refer to an e-mail message, especially if it was one generally distributed. On the whole, this is less useful than printed sources or other Internet material which is accessible to all users, because the reader may not be able to follow up the message. It might be an idea to append a printed copy to your work. Subject of message .
Many major conferences publish their proceedings after the conference.
They may also have a book of abstracts which is available at the time of the conference. The following reference is for a conference paper which is published in the conference proceedings the following year. Privately published, 1989. Other conferences may not specify the editors but an organization may be responsible for the publication 10. It may be hard to find the information that you want to cite in a leaflet.