Cita APA (7th ed.)

Gray S, B. (1964). Human Capital: A theoretical and empirical analysis, with special reference to education. National Bureau of Economic Research.

Cita Chicago (17th ed.)

Gray S, BECKER. Human Capital: A Theoretical and Empirical Analysis, with Special Reference to Education. New York: National Bureau of Economic Research, 1964.

Cita MLA (9th ed.)

Gray S, BECKER. Human Capital: A Theoretical and Empirical Analysis, with Special Reference to Education. National Bureau of Economic Research, 1964.