APA (7th ed.) Citation

Ashenfelter, O. C. (1992). Estimates of the economic return to schooling from a new sample of twins.

Chicago Style (17th ed.) Citation

Ashenfelter, Orley C. Estimates of the Economic Return to Schooling from a New Sample of Twins. Cambridge, Mass, 1992.

MLA (9th ed.) Citation

Ashenfelter, Orley C. Estimates of the Economic Return to Schooling from a New Sample of Twins. 1992.