APA
Knittel C. R., National Bureau of Economic Research & Pindyck R. S. (2013). The Simple economics of commodity price speculation. Cambridge: NBER.
Chicago
Knittel Christopher R, National Bureau of Economic Research and Pindyck Robert S. 2013. The Simple economics of commodity price speculation. Cambridge: NBER.
Harvard
Knittel C. R., National Bureau of Economic Research and Pindyck R. S. (2013). The Simple economics of commodity price speculation. Cambridge: NBER.
MLA
Knittel Christopher R, National Bureau of Economic Research and Pindyck Robert S. The Simple economics of commodity price speculation. Cambridge: NBER. 2013.