Cita APA (7a ed.)

Elhansn, H., & Krugman, P. R. (1999). Trade Policy and Market Structure. MIT Press.

Cita Chicago Style (17a ed.)

Elhansn, Helpman, y Paul R. Krugman. Trade Policy and Market Structure. London: MIT Press, 1999.

Cita MLA (9a ed.)

Elhansn, Helpman, y Paul R. Krugman. Trade Policy and Market Structure. MIT Press, 1999.