Cita APA (7th ed.)

Perry, C. W., & Rosen, H. S. (2001). Insurance and the utilization of medical services among the self-employed. National Bureau of Economic Research.

Cita Chicago (17th ed.)

Perry, Craig William, i Harvey S. Rosen. Insurance and the Utilization of Medical Services Among the Self-employed. Cambridge: National Bureau of Economic Research, 2001.

Cita MLA (9th ed.)

Perry, Craig William, i Harvey S. Rosen. Insurance and the Utilization of Medical Services Among the Self-employed. National Bureau of Economic Research, 2001.