APA
David G., Richards Seth, Markowitz Sara & National Bureau Of Economic Research. (2009). The Effects of Pharmaceutical Marketing and Promotion on Adv. Cambridge: NBER.
Chicago
David Guy, Richards Seth, Markowitz Sara and National Bureau Of Economic Research. 2009. The Effects of Pharmaceutical Marketing and Promotion on Adv. Cambridge: NBER.
Harvard
David G., Richards Seth, Markowitz Sara and National Bureau Of Economic Research. (2009). The Effects of Pharmaceutical Marketing and Promotion on Adv. Cambridge: NBER.
MLA
David Guy, Richards Seth, Markowitz Sara and National Bureau Of Economic Research. The Effects of Pharmaceutical Marketing and Promotion on Adv. Cambridge: NBER. 2009.
