APA (7th ed.) Zitazioa

Freeman, R. B. (1972). Labor economics. Prentice-Hall.

Chicago Style (17th ed.) Zitazioa

Freeman, Richard B. Labor Economics. Englewood Cliffs, N.J.: Prentice-Hall, 1972.

MLA (9th ed.) Zitazioa

Freeman, Richard B. Labor Economics. Prentice-Hall, 1972.