Orley C. Ashenfelter and David Card. (1999). Handbook of Labor Economics. ELSEVIER.
Chicago Style aipamenaOrley C. Ashenfelter and David Card. Handbook of Labor Economics. ELSEVIER, 1999.
MLA aipamenaOrley C. Ashenfelter and David Card. Handbook of Labor Economics. ELSEVIER, 1999.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.