Παραπομπή APA

Freeman,Richard B. (1979). Labor economics (2.). Prentice Hall,INC.

Παραπομπή Chicago Style

Freeman,Richard B. Labor Economics. 2. London: Prentice Hall,INC, 1979.

Παραπομπή MLA

Freeman,Richard B. Labor Economics. 2. Prentice Hall,INC, 1979.