Leena Rao, “Facebook Will Grow Headcount Quickly In 2013 To Develop Money-Making Products, Total Expenses Will Jump By 50 Percent”, TechCrunch, 30 января 2013 г., http://techcrunch.com/2013/01/30/zuck-facebook-will-grow-headcountquickly-in-2013-to-develop-future-money-making-products/ (по состоянию на 10 августа 2013 г.).
