Cita APA (7th ed.)

Levitan, S. A., Mangum, G. L., & Marshall, F. R. (1981). Human resources and labor markets: Employment and training in the American economy (3rd ed.). Harper & Row.

Cita Chicago (17th ed.)

Levitan, Sar A., Garth L. Mangum, i F. Ray Marshall. Human Resources and Labor Markets: Employment and Training in the American Economy. 3rd ed. New York: Harper & Row, 1981.

Cita MLA (9th ed.)

Levitan, Sar A., et al. Human Resources and Labor Markets: Employment and Training in the American Economy. 3rd ed. Harper & Row, 1981.