Cita APA (7a ed.)

Betts, J. R., & Grogger, J. (2000). The impact of grading standards on student achievement, educational attainment, and entry-level earnings. National Bureau of Economic Research.

Cita Chicago Style (17a ed.)

Betts, Julian R., y Jeff Grogger. The Impact of Grading Standards on Student Achievement, Educational Attainment, and Entry-level Earnings. Cambridge, MA: National Bureau of Economic Research, 2000.

Cita MLA (9a ed.)

Betts, Julian R., y Jeff Grogger. The Impact of Grading Standards on Student Achievement, Educational Attainment, and Entry-level Earnings. National Bureau of Economic Research, 2000.