Helpman, E., & Krugman, P. (1985). Market structure and foreing trade: Increasing returns, imperfect competition, and the international economy. Cambridge: MIT Press.
Chicago Style CitationHelpman, Elhanan, and Paul Krugman. Market Structure and Foreing Trade: Increasing Returns, Imperfect Competition, and the International Economy. Cambridge: MIT Press, 1985.
MLA CitationHelpman, Elhanan, and Paul Krugman. Market Structure and Foreing Trade: Increasing Returns, Imperfect Competition, and the International Economy. Cambridge: MIT Press, 1985.
Warning: These citations may not always be 100% accurate.