Lester, R. A. (1964). Economics of labor (2nd ed.). Macmillan.
Cita Chicago (17th ed.)Lester, Richard Allen. Economics of Labor. 2nd ed. New York: Macmillan, 1964.
Cita MLA (9th ed.)Lester, Richard Allen. Economics of Labor. 2nd ed. Macmillan, 1964.
Atenció: Aquestes cites poden no estar 100% correctes.