APA (7th ed.) Citation

Helpman, E., & Krugman, P. R. (1986). Market Structure and foreign trade: Increasing returns, imperfect competition, and the internat. economy (2. print.). MIT Pr.

Chicago Style (17th ed.) Citation

Helpman, Elhanan, and Paul R. Krugman. Market Structure and Foreign Trade: Increasing Returns, Imperfect Competition, and the Internat. Economy. 2. print. Cambridge, Mass. <<[u.a.]>>: MIT Pr, 1986.

MLA (9th ed.) Citation

Helpman, Elhanan, and Paul R. Krugman. Market Structure and Foreign Trade: Increasing Returns, Imperfect Competition, and the Internat. Economy. 2. print. MIT Pr, 1986.