Cita APA (7a ed.)

Sadka, E., & Helpman, E. The optimal income tax.

Cita Chicago Style (17a ed.)

Sadka, Efraim, y Elhanan Helpman. The Optimal Income Tax.

Cita MLA (8a ed.)

Sadka, Efraim, y Elhanan Helpman. The Optimal Income Tax.