Kessler, D. P., & McClellan, M. (1996). Do doctors practice defensive medicinen. National Bureau of Economic Research.
Cita Chicago (17th ed.)Kessler, Daniel P., i Mark McClellan. Do Doctors Practice Defensive Medicinen. Cambridge: National Bureau of Economic Research, 1996.
Cita MLA (9th ed.)Kessler, Daniel P., i Mark McClellan. Do Doctors Practice Defensive Medicinen. National Bureau of Economic Research, 1996.
Atenció: Aquestes cites poden no estar 100% correctes.