Cita APA

Douglas, P. H., & Douglas, P. H. (1939). Social security in the United States; an analysis and appraisal of the Federal Social Security Act ([2. edition]. --.). New York, New York: McGraw-Hill.

Citación estilo Chicago

Douglas, Paul H., y Paul H. Douglas. Social Security in the United States; an Analysis and Appraisal of the Federal Social Security Act. [2. edition]. --. New York, New York: McGraw-Hill, 1939.

Cita MLA

Douglas, Paul H., y Paul H. Douglas. Social Security in the United States; an Analysis and Appraisal of the Federal Social Security Act. [2. edition]. --. New York, New York: McGraw-Hill, 1939.