Cita APA (7a ed.)

Gruber, J., Kim, J., & Mayzlin, D. (1998). Physician fees and procedure intensity: The case of cesarean delivery. National Bureau of Economic Research.

Cita Chicago Style (17a ed.)

Gruber, Jonathan, John Kim, y Dina Mayzlin. Physician Fees and Procedure Intensity: The Case of Cesarean Delivery. Cambridge, MA: National Bureau of Economic Research, 1998.

Cita MLA (9a ed.)

Gruber, Jonathan, et al. Physician Fees and Procedure Intensity: The Case of Cesarean Delivery. National Bureau of Economic Research, 1998.