RT Journal Article SR Electronic T1 How Public Service Advertising Works JF Journal of Advertising Research JO J Advert Res FD WARC SP 591 OP 592 DO 10.2501/S0021849908080604 VO 48 IS 4 A1 Ruth Wooden YR 2008 UL http://www.journalofadvertisingresearch.com/content/48/4/591.abstract AB