This document lists various sources including IBM, Jive, McKinsey, Deloitte, TechnoratiMedia, TNS, Fleishman-Hillard and Hearst Magazines, SNCARC, MarketingCharts, Comscore, Zuberance, McKinsey, HBS Press, Social Media Today, and Texas State University but provides no other context or information about the sources.

5. Source: IBM

6. Source: Jive

7. Source: McKinsey

8. Source: Deloitte

9. Source: TechnoratiMedia

10. Source: TNS

11. Source: Fleishman-Hillard and Hearst Magazines

12. Source: SNCARC

13. Source: MarketingCharts

14. Source: Comscore

15. Source: McKinsey

16. Source: Zuberance

17. Source: Zuberance

18. Source: Zuberance

19. Source: McKinsey

20. Source: McKinsey

21. Source: HBS Press

22. Source: TechnoratiMedia

23. Source: MarketingCharts

24. Source: MarketingCharts

25. Source: MarketingCharts

26. Source: MarketingCharts

28. Source: Texas State University

29. Source: Social Media Today

30. Source: Social Media Today

31. Source: Social Media Today

32. Source: Social Media Today