MLA

Krebs, Tom. Human Capital Risk, Contract Enforcement, and the Macroeconomy. Cambridge, Mass: National Bureau of Economic Research, 2011.

APA

Krebs, T. (2011). Human Capital Risk, Contract Enforcement, and the Macroeconomy. Cambridge, Mass: National Bureau of Economic Research.

Chicago

Krebs, Tom. Human Capital Risk, Contract Enforcement, and the Macroeconomy. Cambridge, Mass: National Bureau of Economic Research, 2011.