APA
Cockburn I. M., National Bureau of Economic Research, Lanjouw J. O. & Schankerman M. (2014). Patents and the global diffusion of new drugs. Cambridge: NBER.
Chicago
Cockburn Iain M, National Bureau of Economic Research, Lanjouw Jean O and Schankerman Mark. 2014. Patents and the global diffusion of new drugs. Cambridge: NBER.
Harvard
Cockburn I. M., National Bureau of Economic Research, Lanjouw J. O. and Schankerman M. (2014). Patents and the global diffusion of new drugs. Cambridge: NBER.
MLA
Cockburn Iain M, National Bureau of Economic Research, Lanjouw Jean O and Schankerman Mark. Patents and the global diffusion of new drugs. Cambridge: NBER. 2014.