Cita APA (7th ed.)

Levitan, S. A., Mangum, G. L., & Marshal, R. (1981). Human resources and labor markets: Employment and training in the American economy. Harper & Row.

Cita Chicago (17th ed.)

Levitan, Sar A., G. L. Mangum, i R. Marshal. Human Resources and Labor Markets: Employment and Training in the American Economy. N. Y: Harper & Row, 1981.

Cita MLA (9th ed.)

Levitan, Sar A., et al. Human Resources and Labor Markets: Employment and Training in the American Economy. Harper & Row, 1981.