RT Journal Article SR Electronic T1 What Do We Know About Social-Media Marketing? JF Journal of Advertising Research JO J Advert Res FD WARC SP 383 OP 384 DO 10.2501/JAR-2019-041 VO 59 IS 4 A1 John B. Ford YR 2019 UL http://www.journalofadvertisingresearch.com/content/59/4/383.abstract AB