Reference: #. Author(s) Last name Initials. Title of paper. In: Title of conference proceedings; Year Month Day(s) of conference; Location City, Country. Place of publication: Publisher; cYear of publication. Page numbers.
20. O'Connor J. Towards a greener Ireland. In: Discovering our natural sustainable resources: future proofing; 2009 March 15-16; Dublin, Ireland. Dublin: Environmental Institute; c2010. p. 65-69.
Use a superscript number (like this: ¹) in the text at the place where you are indicating that you are citing from a source.
O'Connor outlines her vision for using renewable energy sources.20