APA
Hall B. H., National Bureau of Economic Research & Sena V. (2014). Appropriability mechanisms, innovation and productivity. Cambridge: NBER.
Chicago
Hall Bronwyn H, National Bureau of Economic Research and Sena Vania. 2014. Appropriability mechanisms, innovation and productivity. Cambridge: NBER.
Harvard
Hall B. H., National Bureau of Economic Research and Sena V. (2014). Appropriability mechanisms, innovation and productivity. Cambridge: NBER.
MLA
Hall Bronwyn H, National Bureau of Economic Research and Sena Vania. Appropriability mechanisms, innovation and productivity. Cambridge: NBER. 2014.