Cita APA (7a ed.)

Krugman, P. R. (1990). Rethinking international trade ([1st ed.], 2nd printing.). MIT.

Cita Chicago Style (17a ed.)

Krugman, Paul R. Rethinking International Trade. [1st ed.], 2nd printing. Cambridge (Massachusetts) [etc.]: MIT, 1990.

Cita MLA (9a ed.)

Krugman, Paul R. Rethinking International Trade. [1st ed.], 2nd printing. MIT, 1990.