APA aipamena

Laibson, D., & Tobacman, J. (2000). A debt puzzle. National Bureau of Economic Research.

Chicago Style aipamena

Laibson, David, and Jeremy Tobacman. A Debt Puzzle. Cambridge: National Bureau of Economic Research, 2000.

MLA aipamena

Laibson, David, and Jeremy Tobacman. A Debt Puzzle. National Bureau of Economic Research, 2000.