Cita APA (7th ed.)

Orley C. Ashenfelter and David Card. (1999). Handbook of Labor Economics. ELSEVIER.

Cita Chicago (17th ed.)

Orley C. Ashenfelter and David Card. Handbook of Labor Economics. ELSEVIER, 1999.

Cita MLA (8th ed.)

Orley C. Ashenfelter and David Card. Handbook of Labor Economics. ELSEVIER, 1999.

Atenció: Aquestes cites poden no estar 100% correctes.