Format: 

[1]F. Lastname, "Title of paper," in Title of Proceeding. City, State, Country: Publisher, Year, Page(s). DOI.

[2]F. Lastname, "Title of paper," in Title of Proceeding. City, State, Country: Publisher, Year, Page(s). [Online]. Available: URL

[3]F. Lastname, "Title of paper," presented at Conference, City, State, Country, Month Day, Year.

In-text: In-text citations are treated as if they were footnotes and are enclosed in square brackets [1].

Examples: 

[1]D. Oram, "Considering sustainability through ethical approaches and their practical application," in Proc. 2009 IEEE Int. Symp. Sustainabile Syst. & Technology (ISSST) and 2009 Symp. Technol. and Soc. (ISTAS), pp. 1-6. doi:10.1109/ISTAS.2009.5155906.

[2]D. Oram, "Considering sustainability through ethical approaches and their practical application," presented at 2009 Symp. Technol. and Soc., Tempe, AZ, USA, May 19, 2009.

Notes: 

If the conference proceeding was published by IEEE, you do not need to provide information on the publisher. You can should omit articles and prepositions from the proceeding or conference's title and use commonly abbreviated terms where appropriate (see p. 37, "Published Conference Proceedings). For a list of recommend abbreviations, see p. 36, "Published Conference Proceedings." If you accessed the conference paper online, provide a DOI if available; otherwise, provide the URL to the publisher's website or the name of the library database as per APA style (see pg. 38, "On-Line Sources").

Questions? Contact an RIT Librarian at libraryhelp@rit.edu

Source:
IEEE - Published Conference Proceedings (p. 36-37)