Helpman, E., & Krugman, P. R. (1985). Market structure and foreign trade: Increasing returns, imperfect competition and the international economy.
Chicago Edition CitationHelpman, Elhanan, and Paul R. Krugman. Market Structure and Foreign Trade: Increasing Returns, Imperfect Competition and the International Economy. Great Britain, Wheat Sheaf books, 1985.
MLA Edition CitationHelpman, Elhanan, and Paul R. Krugman. Market Structure and Foreign Trade: Increasing Returns, Imperfect Competition and the International Economy. 1985.
Warning: These citations may not always be 100% accurate.