Cita APA (7a ed.)

Hoffman, S. D., & Seidman, L. S. (1990). The earned income tax credit: Antipoverty effectiveness and labour market effects. W.E. Upjohn Institute for Employment Research.

Cita Chicago Style (17a ed.)

Hoffman, Saul D., y Laurence S. Seidman. The Earned Income Tax Credit: Antipoverty Effectiveness and Labour Market Effects. Kalamazoo, Mich: W.E. Upjohn Institute for Employment Research, 1990.

Cita MLA (9a ed.)

Hoffman, Saul D., y Laurence S. Seidman. The Earned Income Tax Credit: Antipoverty Effectiveness and Labour Market Effects. W.E. Upjohn Institute for Employment Research, 1990.