Cita APA (7th ed.)

Alesina, A., & Spolaore, E. (2005). The size of nations. MIT Press.

Cita Chicago (17th ed.)

Alesina, Alberto, i Enrico Spolaore. The Size of Nations. Cambridge: MIT Press, 2005.

Cita MLA (9th ed.)

Alesina, Alberto, i Enrico Spolaore. The Size of Nations. MIT Press, 2005.