APA
Wen W., National Bureau of Economic Research, Ceccagnoli M. & Forman C. (2013). Patent commons, thickets, and open source software entry by start-up firms. Cambridge: NBER.
Chicago
Wen Wen, National Bureau of Economic Research, Ceccagnoli Marco and Forman Chris. 2013. Patent commons, thickets, and open source software entry by start-up firms. Cambridge: NBER.
Harvard
Wen W., National Bureau of Economic Research, Ceccagnoli M. and Forman C. (2013). Patent commons, thickets, and open source software entry by start-up firms. Cambridge: NBER.
MLA
Wen Wen, National Bureau of Economic Research, Ceccagnoli Marco and Forman Chris. Patent commons, thickets, and open source software entry by start-up firms. Cambridge: NBER. 2013.