APA
Clemens J., National Bureau of Economic Research & Veuger S. (2015). Risks to the returns to medical innovation. Cambridge: NBER.
Chicago
Clemens Jeffrey, National Bureau of Economic Research and Veuger Stan. 2015. Risks to the returns to medical innovation. Cambridge: NBER.
Harvard
Clemens J., National Bureau of Economic Research and Veuger S. (2015). Risks to the returns to medical innovation. Cambridge: NBER.
MLA
Clemens Jeffrey, National Bureau of Economic Research and Veuger Stan. Risks to the returns to medical innovation. Cambridge: NBER. 2015.