APA
Hall B. H., National Bureau of Economic Research & Harhoff D. (2012). Recent research on the economics of patents. Cambridge: NBER.
Chicago
Hall Bronwyn H, National Bureau of Economic Research and Harhoff Dietmar. 2012. Recent research on the economics of patents. Cambridge: NBER.
Harvard
Hall B. H., National Bureau of Economic Research and Harhoff D. (2012). Recent research on the economics of patents. Cambridge: NBER.
MLA
Hall Bronwyn H, National Bureau of Economic Research and Harhoff Dietmar. Recent research on the economics of patents. Cambridge: NBER. 2012.