APA
Shavell S., Ypersele T. v., . (1999). Rewards versus intellectual property rights. Cambridge, Mass: National Bureau of Economic Research.
Chicago
Shavell Steven, Ypersele Tanguy van, . 1999. Rewards versus intellectual property rights. Cambridge, Mass: National Bureau of Economic Research.
Harvard
Shavell S., Ypersele T. v., . (1999). Rewards versus intellectual property rights. Cambridge, Mass: National Bureau of Economic Research.
MLA
Shavell Steven, Ypersele Tanguy van, . Rewards versus intellectual property rights. Cambridge, Mass: National Bureau of Economic Research. 1999.