APA aipamena

Orley C. Ashenfelter, D. C. (1999). Handbook of Labor Economics. ELSEVIER.

Chicago Style aipamena

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

MLA aipamena

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

Kontuz: berrikusi erreferentzia hauek erabili aurretik.