US Display Ad Revenues at Top 4 Online Ad Selling Companies (2009-2012)

http://www.digitalstrategyconsulting.com/intelligence/2011/03/facebook_ad_revenue_near_doubl.php

參考來源：

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- Facebook ad revenue near doubling- to overtake Yahoo this year (Digital Knowledge Centre - Digital Intelligence) (在「Google 網頁註解」中檢視)