Do Gun control laws work? Who can prove this wiki informaiton false?

Yes, and the guy buying the gun also.

Why Can't the U.S. Treat Guns as a Public-Health Problem? - The Atlantic like that of Mark Rosenberg, then the director of the CDC’s National Center for Injury Prevention and Control. In response to the early ’90s crime wave, Rosenberg had said in 1994, “We need to revolutionize the way we look at guns, like what we did with cigarettes … It used to be that smoking was a glamour symbol—cool, sexy, macho. Now it is dirty, deadly—and banned.”…

that is only one of several.
*We’re going to systematically build a case that owning firearms causes deaths. We’re doing the most we can do, given the political realities.” (P.W. O’Carroll, Acting Section Head of Division of Injury Control, CDC, *http://thehill.com/blogs/congress-blog/politics/261307-why-congress-stopped-gun-control-activism-at-the-cdc

Yes, and so why doesnt it run gun studies? Maybe because the few CDC studies were biased and based on bad science.