Cita APA

Krugman, P. (1991). Geography and trade. Leuven, Belgium: Leuven University Press.

Chicago Style Citation

Krugman, Paul. Geography and Trade. Leuven, Belgium: Leuven University Press, 1991.

Cita MLA

Krugman, Paul. Geography and Trade. Leuven, Belgium: Leuven University Press, 1991.

Atenció: Aquestes cites poden no estar 100% correctes.