Cita APA (7th ed.)

Krugman, P. R. (1995). Development, geography, and economic theory. MIT Press.

Cita Chicago (17th ed.)

Krugman, Paul R. Development, Geography, and Economic Theory. Cambridge, Mass: MIT Press, 1995.

Cita MLA (9th ed.)

Krugman, Paul R. Development, Geography, and Economic Theory. MIT Press, 1995.