APA
Bar T., National Bureau of Econoimc Research & Lillard D. R. (2014). Direct to consumer advertising of pharmaceutical drugs. Cambridge: NBER.
Chicago
Bar Talia, National Bureau of Econoimc Research and Lillard Dean R. 2014. Direct to consumer advertising of pharmaceutical drugs. Cambridge: NBER.
Harvard
Bar T., National Bureau of Econoimc Research and Lillard D. R. (2014). Direct to consumer advertising of pharmaceutical drugs. Cambridge: NBER.
MLA
Bar Talia, National Bureau of Econoimc Research and Lillard Dean R. Direct to consumer advertising of pharmaceutical drugs. Cambridge: NBER. 2014.