APA
Erkal N., Scotchmer Suzanne & National Bureau Of Economic Research. (2009). Scarcity of ideas and R&D options: Use it, lose it or bank i. Cambridge: NBER.
Chicago
Erkal Nisvan, Scotchmer Suzanne and National Bureau Of Economic Research. 2009. Scarcity of ideas and R&D options: Use it, lose it or bank i. Cambridge: NBER.
Harvard
Erkal N., Scotchmer Suzanne and National Bureau Of Economic Research. (2009). Scarcity of ideas and R&D options: Use it, lose it or bank i. Cambridge: NBER.
MLA
Erkal Nisvan, Scotchmer Suzanne and National Bureau Of Economic Research. Scarcity of ideas and R&D options: Use it, lose it or bank i. Cambridge: NBER. 2009.
