APA
Card D. (., Freeman R. B. (., . (1993). Small differences that matter: Labor markets and income, mai. Chicago: Uni of Chicago Pr.
Chicago
Card David (ed), Freeman Richard B (ed), . 1993. Small differences that matter: Labor markets and income, mai. Chicago: Uni of Chicago Pr.
Harvard
Card D. (., Freeman R. B. (., . (1993). Small differences that matter: Labor markets and income, mai. Chicago: Uni of Chicago Pr.
MLA
Card David (ed), Freeman Richard B (ed), . Small differences that matter: Labor markets and income, mai. Chicago: Uni of Chicago Pr. 1993.