Citace podle APA (7th ed.)

Ashenfelter, O., & Rouse, C. (1997). Income, schooling, and ability: Evidence from a new sample of identical twins. National Bureau of Economic Research.

Citace podle Chicago (17th ed.)

Ashenfelter, Orley, a Cecilia Rouse. Income, Schooling, and Ability: Evidence from a New Sample of Identical Twins. Cambridge: National Bureau of Economic Research, 1997.

Citace podle MLA (9th ed.)

Ashenfelter, Orley, a Cecilia Rouse. Income, Schooling, and Ability: Evidence from a New Sample of Identical Twins. National Bureau of Economic Research, 1997.

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