Cita APA (7th ed.)

Howell, W. G., & Peterson, P. E. (2006). The education gap: Vouchers and urban schools (Rev. ed.). Brookings Institution Press.

Cita Chicago (17th ed.)

Howell, William G., i Paul E. Peterson. The Education Gap: Vouchers and Urban Schools. Rev. ed. Washington, D.C: Brookings Institution Press, 2006.

Cita MLA (9th ed.)

Howell, William G., i Paul E. Peterson. The Education Gap: Vouchers and Urban Schools. Rev. ed. Brookings Institution Press, 2006.