Cita APA (7th ed.)

Altman, D., Cutler, D. M., & Zeckhauser, R. J. (2000). Enrollee mix, treatment intensity, and cost in competing indemnity and HMO plans. National Bureau of Economic Research.

Cita Chicago (17th ed.)

Altman, Daniel, David M. Cutler, i Richard J. Zeckhauser. Enrollee Mix, Treatment Intensity, and Cost in Competing Indemnity and HMO Plans. Cambridge: National Bureau of Economic Research, 2000.

Cita MLA (9th ed.)

Altman, Daniel, et al. Enrollee Mix, Treatment Intensity, and Cost in Competing Indemnity and HMO Plans. National Bureau of Economic Research, 2000.