Style de citation APA (7e éd.)
Helpman, E., & Krugman, P. R. (1993). Market Structure and Foreign Trade: Increasing Returns, Imperfect Competition, and the International Economy (5. ed.). MIT Press.
Style de citation Chicago (17e éd.)
Helpman, Elhanan, et Paul R. Krugman. Market Structure and Foreign Trade: Increasing Returns, Imperfect Competition, and the International Economy. 5. ed. Cambridge: MIT Press, 1993.
Style de citation MLA (9e éd.)
Helpman, Elhanan, et Paul R. Krugman. Market Structure and Foreign Trade: Increasing Returns, Imperfect Competition, and the International Economy. 5. ed. MIT Press, 1993.
Attention : ces citations peuvent ne pas être correctes à 100%.