Valentino-DeVries, Jennifer. To Block or Not to Block Online Ads. The Wall Street Journal. Dow Jones & Company. 2010-03-08 [2010-04-10]. (原始内容存档于2010-03-11).
Valentino-DeVries, Jennifer. To Block or Not to Block Online Ads. The Wall Street Journal. Dow Jones & Company. 2010-03-08 [2010-04-10]. (原始内容存档于2010-03-11).