APA (7e ed.) Bronvermelding

Ashenfelter, O., & Card, D. (1999). Handbook of labor economics (1a. ed.). Elsevier.

Chicago (17e ed.) Bronvermelding

Ashenfelter, Orley, en David Card. Handbook of Labor Economics. 1a. ed. Amsterdam: Elsevier, 1999.

MLA (9e ed.) Bronvermelding

Ashenfelter, Orley, en David Card. Handbook of Labor Economics. 1a. ed. Elsevier, 1999.