english: Dan Rowinsky, “What You Need to Know about SOPA in 2012", ReadWriteWeb Wikipedia, “Stop Online Piracy Act” Rebecca MacKinnon and Ivan Sigal, “Online piracy laws must preserve Web freedom, CNN.”
non_english: Dan Rowinsky, “What You Need to Know about SOPA in 2012", ReadWriteWeb Wikipedia, “Stop Online Piracy Act” Rebecca MacKinnon and Ivan Sigal, “Online piracy laws must preserve Web freedom, CNN.”