APA
Kerr S. P., National Bureau of Economic Research & Kerr W. R. (2015). Global collaborative patents. Cambridge: NBER.
Chicago
Kerr Sari Pekkala, National Bureau of Economic Research and Kerr William R. 2015. Global collaborative patents. Cambridge: NBER.
Harvard
Kerr S. P., National Bureau of Economic Research and Kerr W. R. (2015). Global collaborative patents. Cambridge: NBER.
MLA
Kerr Sari Pekkala, National Bureau of Economic Research and Kerr William R. Global collaborative patents. Cambridge: NBER. 2015.