Social media - Marketing.

ROI of $ocial media : how to improve the return on your social marketing investment by: Groves, Steven; Powell, Guy R.; Dimos, Jerry (Language materials, printed)

Return on engagement : content, strategy, and design techniques for digital marketing by: Frick, Tim (Language materials, printed)

DigiMarketing : the essential guide to new media & digital marketing by: Wertime, Kent; Fenwick, Ian (Language materials, printed)