APA
Hellman T., National Bureau Of Economic Research, . (2005). The role of patents for bridging the science to market gap. Cambridge, MA: NBER.
Chicago
Hellman Thomas, National Bureau Of Economic Research, . 2005. The role of patents for bridging the science to market gap. Cambridge, MA: NBER.
Harvard
Hellman T., National Bureau Of Economic Research, . (2005). The role of patents for bridging the science to market gap. Cambridge, MA: NBER.
MLA
Hellman Thomas, National Bureau Of Economic Research, . The role of patents for bridging the science to market gap. Cambridge, MA: NBER. 2005.