Symposium:
Contributor, A, A., Contributor, B. B., Contributor, C. C., & Contributor, D. D. (Year, Month Day). Title of contribution [Description of contribution]. In E. E. Chairperson (Chair), Title of Symposium/Conference, Location.
Paper presented or poster session:
Presenter, A. A. (Year, Month Day). Title of paper or poster. Paper or poster session presented at the meeting of Organization Name, Location.