Cita APA (7a ed.)

Krugman, P. R. (1991). Currencies and crises. MIT Press.

Cita Chicago Style (17a ed.)

Krugman, Paul R. Currencies and Crises. Cambridge, Mass. [etc.]: MIT Press, 1991.

Cita MLA (9a ed.)

Krugman, Paul R. Currencies and Crises. MIT Press, 1991.