APA (7th ed.) Citation

Clotfelter, C. T., Ladd, H. F., & Vigdor, J. L. (2007). Teacher credentials and student achievement in high school: A cross-subject analysis with student fixed effects. National Bureau of Economic Research.

Chicago Style (17th ed.) Citation

Clotfelter, Charles T., Helen F. Ladd, and Jacob L. Vigdor. Teacher Credentials and Student Achievement in High School: A Cross-subject Analysis with Student Fixed Effects. Cambridge, Mass: National Bureau of Economic Research, 2007.

MLA (9th ed.) Citation

Clotfelter, Charles T., et al. Teacher Credentials and Student Achievement in High School: A Cross-subject Analysis with Student Fixed Effects. National Bureau of Economic Research, 2007.