APA (7. basım) Alıntı

Freeman, R. B., & Schettkat, R. (1999). The role of wage and skill differences in US-German employment differences. National Bureau of Economic Research.

Chicago Style (17. basım) Atıf

Freeman, Richard B., ve Ronald Schettkat. The Role of Wage and Skill Differences in US-German Employment Differences. Cambridge: National Bureau of Economic Research, 1999.

MLA (9th ed.) Atıf

Freeman, Richard B., ve Ronald Schettkat. The Role of Wage and Skill Differences in US-German Employment Differences. National Bureau of Economic Research, 1999.