(ASA Style Guide 2014 section 4.3.2p. 56, and appendix p. 113)
(Author Last name Year of publication)
Author Last name, First name. Year of presentation. "Title of Poster." Paper presented at, Month date, Location. Retrieved Month date, year (URL).
Jones, Amanda Michelle. 2016. "How Homeless Youth Navigate Multiple Marginalizations." Paper presented at ASA Annual Meeting, August 22, Seattle. Retrieved June 29, 2017 (https://convention2.allacademic.com/one/asa/asa16/index.php?cmd=Online+Program+View+Paper&selected_paper_id=1122469&PHPSESSID=pt3lj2dsdmsd0dn6cd85hskr42).