Cita APA (7th ed.)

Cameron, S. V., & Heckman, J. J. (1998). Life cycle schooling and dynamic selection bias: Models and evidence for five cohorts of American males. National Bureau of Economic Research.

Cita Chicago (17th ed.)

Cameron, Stephen V., i James J. Heckman. Life Cycle Schooling and Dynamic Selection Bias: Models and Evidence for Five Cohorts of American Males. Cambridge: National Bureau of Economic Research, 1998.

Cita MLA (9th ed.)

Cameron, Stephen V., i James J. Heckman. Life Cycle Schooling and Dynamic Selection Bias: Models and Evidence for Five Cohorts of American Males. National Bureau of Economic Research, 1998.